Explanation:

Microsoft's identity platform (Microsoft Entra ID, formerly Azure AD) supports built-in and custom directory roles. The official guidance states that you can "create your own custom roles to grant permissions for management of Microsoft Entra resources," and those roles consist of specific role permissions that you select to tailor least-privilege administration. The documentation also lists Global administrator (formerly Company Administrator) as a built-in role that "has access to all administrative features" and can delegate role assignments, reset passwords for all users, and manage identity settings across the tenant. Regarding assignments, Microsoft is explicit that role assignment is many-to-many: administrators can "assign one or more roles to a user," and the user's effective permissions are the union of the privileges from all assigned roles. Consequently, (1) creating custom roles is supported (Yes), (2) Global administrator is indeed a defined Azure AD/Microsoft Entra role (Yes), and (3) a user being limited to only one role is incorrect (No) because multiple role assignments to the same user are permitted and commonly used to implement least privilege and separation of duties.
Box 1: Yes
Azure AD supports custom roles.
Box 2: Yes
Global Administrator has access to all administrative features in Azure Active Directory. Box 3: No Reference:
https://docs.microsoft.com/en-us/azure/active-directory/roles/concept-understand-roles https://docs.microsoft.
com/en-us/azure/active-directory/roles/permissions-reference

In Microsoft Purview, Sensitivity labels are the feature designed to let users identify and classify content that should be protected. Microsoft's guidance explains that sensitivity labels "enable you to classify and protect your organization's data while ensuring that user productivity and collaboration aren't hindered." Users can manually choose a label in Office apps and services to indicate the data's sensitivity; as Microsoft notes, labels "can be applied by users or automatically," and the label "persists with the content in its metadata." Once identified with a label, protection settings can be enforced, including "encryption, content marking (headers, footers, watermarks), and access restrictions based on the label." By comparison, Data Loss Prevention (DLP) focuses on "monitoring and blocking the unintentional sharing of sensitive information" based on policy-DLP enforces handling rules after data is identified, rather than providing the user-centric classification mechanism. Insider Risk addresses "risky user activities and insider data security scenarios," and eDiscovery is used to "find, preserve, collect, and review content for investigations or litigation." Therefore, the feature that explicitly allows users to identify content that should be protected-by selecting and applying a classification that then drives protection-is Sensitivity labels.

Azure Active Directory (Azure AD) access reviews enable organizations to efficiently manage group memberships, access to enterprise applications, and role assignments.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/governance/access-reviews-overview

In Microsoft's identity platform, Active Directory Domain Services (AD DS) is the on-premises directory that maintains directory objects such as users, groups, and computers. Microsoft documentation describes AD DS as a service that "stores information about objects on the network and makes this information easy for administrators and users to find and use." It further explains that AD DS contains objects like "users, groups, computers, and other resources," and that administrators use tools such as Active Directory Users and Computers to create and manage these objects. A key object type is the computer account; Microsoft states that "a computer that's joined to a domain has a corresponding computer account object in Active Directory" and that these accounts are created and managed within AD DS to enable secure authentication and authorization for domain-joined devices.
By contrast, mobile devices are typically enrolled and managed through Microsoft Intune/Endpoint Manager and Azure AD device objects, not created in AD DS. Likewise, SaaS applications that require modern authentication integrate with Microsoft Entra ID (Azure AD) using OpenID Connect/OAuth 2.0-not with AD DS. Line-of-business apps that rely on modern authentication are also registered in Entra ID, while AD DS supports traditional Kerberos/NTLM for domain resources. Therefore, among the options provided, the object you can create in AD DS is computer accounts.

Within Microsoft Purview, Insider Risk Management is the solution that is explicitly designed to detect activities such as IP theft and data leakage. Microsoft describes it as a compliance solution that correlates many user and system signals to identify potentially malicious or inadvertent insider risks, including leaks of sensitive data and data spillage.
Organizations create Insider Risk Management policies that watch for risky behaviors such as unusual file downloads, copying data to removable media, or sharing sensitive information to external locations. When configured with templates like Data leaks, these policies can use high-severity alerts from Data Loss Prevention (DLP) policies as triggers, so that suspected data-leak events automatically generate alerts and cases for investigation. This workflow lets investigators quickly triage, investigate, and remediate possible data-exfiltration incidents.
The other options serve different purposes. Compliance Manager evaluates and tracks compliance posture against regulations and internal controls, rather than monitoring user behavior for leaks. Communication compliance focuses on inappropriate or non-compliant messages (such as harassment or improper sharing in chats and email). eDiscovery is used to find and preserve existing content for legal or investigative cases, not for proactive detection of leakage as it occurs.
Therefore, the Microsoft Purview solution used to identify data leakage is Insider Risk Management.