The correct answer is D.
Service agents need a guided process to confirm a user's identity before sharing support information. Salesforce Flow for Service supports guided action flows through the Actions & Recommendations component on a record page. This lets agents follow step-by-step prompts, such as identity verification questions, directly from the Case record. Salesforce Trailhead explains that Flow for Service shows users a to-do list on a record page, and selecting a step can launch a flow that guides the rep through the task.
A . Path is for guiding users through stages, not collecting identity-verification prompts. B. Validation Rules only block invalid saves. C. Surveys collect feedback, not identity confirmation during a support call.

The correct answer is D. Approval process.
The requirement is to automate travel request form submission and enforce an internal approval policy. Salesforce approval processes are specifically designed to automate how records are submitted, reviewed, approved, rejected, recalled, and acted upon. Salesforce Trailhead explains that an approval process defines the criteria a record must meet before submission, the approval steps, approvers, and the actions taken when the record is approved or rejected.
This exact scenario also aligns with Salesforce's travel approval training example, where a Travel Approval object uses an approval process to route travel requests to the employee's manager and, when needed, to another approver.
A is incorrect because assignment rules route leads or cases, not approval requests.
B is incorrect because validation rules prevent invalid saves but do not manage approval routing.
C is incorrect because Apex is unnecessary when a standard declarative approval process fits the requirement.

The correct answer is B. Create a unique External ID field and use Data Loader.
Cloud Kicks is receiving shipment data from an external shipping system on a regular basis. To prevent duplicate Delivery records and update the correct existing records, the app builder should create a field such as Tracking Number on Delivery__c, mark it as External ID and Unique, then use Data Loader Upsert.
Salesforce documentation states that external IDs can be used when importing custom objects to prevent duplicate records. Salesforce Data Loader documentation also states that upsert combines insert and update: if a matching record exists, it updates it; otherwise, it creates a new record.
A is less appropriate because this is a recurring system migration/update scenario, and Data Loader with External ID is the stronger tool.
C is incomplete because matching only on Salesforce ID requires the external system to already store Salesforce record IDs.
D may help detect duplicates, but duplicate/matching rules do not provide the clean upsert mechanism needed to update the correct existing record.

The correct answer is D. Approval process.
The marketing director wants all free parts to receive sign-off before they are allowed. Salesforce Approval Processes are used to automate how records are approved, define who approves at each step, and specify actions after approval or rejection. Trailhead describes approval processes as automation for record approval and explains that approval steps assign approval requests to specific users.
Chatter approval is not the standard feature for formal record sign-off. Slack post and automated email message can notify people, but they do not enforce approval. An Approval Process is the correct declarative feature for required business sign-off.

The correct answers are A. Lightning App Builder and D. Quick Action.
A Lightning component can be exposed for use in Salesforce pages through supported targets such as App Page, Home Page, and Record Page, which are configured through Lightning App Builder. Salesforce developer documentation also confirms that components can be configured as quick actions using targets such as lightning__RecordAction or lightning__GlobalAction.
C . Validation Rule is incorrect because validation rules are business logic formulas, not places where Lightning components are placed or rendered. B. Time Failure is not a valid Salesforce area for using Lightning components based on the given option wording.