Enterprise architecture (EA) is the most helpful to an IS auditor reviewing the alignment of planned IT budget with the organization's goals and strategic objectives. EA is a well-defined practice for conducting enterprise analysis, design, planning, and implementation, using a comprehensive approach at all times, for the successful development and execution of strategy1. EA provides a blueprint for an effective IT strategy and guides the controlled evolution of IT in a way that delivers business benefit in a cost-effective way2. By reviewing the EA, the IS auditor can evaluate how well the planned IT budget supports the business vision, strategy, objectives, and capabilities of the organization.
The other options are not as helpful as EA for reviewing the alignment of planned IT budget with the organization's goals and strategic objectives. BIA is a process of determining the criticality of business activities and associated resource requirements to ensure operational resilience and continuity of operations during and after a business disruption3. BIA quantifies the impacts of disruptions on service delivery, risks to service delivery, and recovery time objectives (RTOs) and recovery point objectives (RPOs)3. BIA is useful for developing strategies, solutions, and plans for business continuity and disaster recovery, but it does not directly address the alignment of planned IT budget with the organization's goals and strategic objectives. Risk assessment report is a document that contains the results of performing a risk assessment or the formal output from the process of assessing risk4. Risk assessment is a method to identify, analyze, and control hazards and risks present in a situation or a place5. Risk assessment report is useful for identifying and mitigating potential threats and issues that are detrimental to the business or an enterprise, but it does not directly addressthe alignment of planned IT budget with the organization's goals and strategic objectives. Audit recommendations are guidance that highlights actions to be taken by management6. When implemented, process risks should be mitigated, and performance should be enhanced6. Audit recommendations are useful for improving the quality and reliability of the information system and its outputs, but they do not directly address the alignment of planned IT budget with the organization's goals and strategic objectives. Therefore, option A is the correct answer.

The best option for ensuring confidentiality through the use of asymmetric encryption is to encrypt a message with the recipient's public key (option A). This is because:
Asymmetric encryption, also known as public-key cryptography, is a type of encryption that uses a pair of keys to encrypt and decrypt data. The pair of keys includes a public key, which can be shared with anyone, and a private key, which is kept secret by the owner12.
In asymmetric encryption, the sender uses the recipient's public key to encrypt the data. The recipient then uses their private key to decrypt the data. This approach allows for secure communication between two parties without the need for both parties to have the same secret key12.
Encrypting a message with the recipient's public key ensures that only the recipient can decrypt it with their private key. This provides confidentiality, which means that the message is protected from unauthorized access or disclosure12.
Encrypting a message with the sender's private key (option B) does not ensure confidentiality, but rather authentication, which means that the message can be verified as coming from the sender. This is because anyone can decrypt the message with the sender's public key, but only the sender can encrypt it with their private key12.
Encrypting a message with the sender's public key (option C) or the recipient's private key (option D) does not make sense, as it would render the message unreadable by both parties. This is because neither party has the corresponding key to decrypt it12.
Therefore, the best option for ensuring confidentiality through the use of asymmetric encryption is to encrypt a message with the recipient's public key (option A), as this ensures that only the recipient can decrypt it with their private key.
References: 1: What is asymmetric encryption? | Asymmetric vs. symmetric ... - Cloudflare 2: What is Asymmetric Encryption? - GeeksforGeeks

The best answer is B. Residual risk.
ISACA defines residual risk as the amount of risk remaining after controls and mitigation efforts are put in place. Because risk management strategies are implemented to mitigate risk, the type of risk most directly reduced is residual risk. Inherent risk exists before controls are applied, so it is not the risk category most directly reduced by control implementation. Sampling risk and detection risk are audit risks, not the primary target of enterprise risk treatment strategies.
Option C is incorrect because inherent risk is the baseline level of risk absent controls. Option A and D relate to audit methodology and audit assurance rather than enterprise risk treatment outcomes. ISACA's risk guidance consistently describes controls and mitigation efforts as mechanisms to reduce remaining exposure to an acceptable level, which is residual risk.
References (Official ISACA):
ISACA Journal, Quantifying the Qualitative Technology Risk Assessment.
ISACA Journal, Risk Assessment and Analysis Methods.
ISACA Journal, From Measurement to Management.

Automated version control systems are the best method to maintain an audit trail of changes made to the source code of a program. They automatically track and manage changes to the source code over time, allowing you to see what changes were made, when they were made, and who made them1. This provides a clear and detailed audit trail that can be invaluable for debugging, understanding the evolution of the code, and ensuring accountability23.