According to the ACAMS CAMS Certification Study Guide, 6th Edition, one of the four pillars of an effective anti-money laundering compliance program is the training of appropriate employees on their responsibilities and the institution's policies and procedures. Training is essential to ensure that employees are aware of the risks of money laundering and terrorist financing, the applicable laws and regulations, the red flags and indicators of suspicious activity, and the reporting and record-keeping requirements. Without proper training, employees may not be able to perform their duties effectively and efficiently, and may expose the institution to legal, regulatory, reputational, and operational risks.
The other options are less serious deficiencies, but still need to be addressed and corrected. The compliance officer should have regular meetings with upper management to inform them of the current money laundering trends and the status of the compliance program, but this is not as critical as providing training to the employees. The company's anti-money laundering manual should be updated to reflect any changes in the internal controls, policies, or procedures, but this is not as urgent as ensuring that the employees are familiar with the existing ones. The company should download the most recent regulation from the Financial Intelligence Unit web site, but this is not as important as complying with the existing ones.
ACAMS CAMS Certification Study Guide, 6th Edition, Chapter 2, Section 2.1.4, page 39.
ACAMS CAMS Certification Video Training Course, Module 2, Lesson 2.1.4.

The compliance officer is the person who has the day-to-day responsibility of communicating and reinforcing the established anti-money laundering (AML) compliance culture and program within the organization. The compliance officer is also responsible for overseeing the implementation, maintenance, and improvement of the AML policies, procedures, controls, and training. The compliance officer should have sufficient authority, independence, and resources to perform their duties effectively and report to senior management and the board of directors on the status and effectiveness of the AML program.
1, Chapter 4: Designing and Implementing an AML Compliance Program
2, FFIEC BSA/AML Examination Manual, Compliance Program - Overview
3, FinCEN Advisory, Guidance on Promoting a Culture of Compliance

According to the Wolfsberg Anti-Money Laundering Principles for Private Banking, the beneficial owners of a private banking account are those who generally have ultimate control over the funds in the account and those who are the ultimate source of funds for the account and whose source of wealth should be subject to due diligence1. These two criteria are meant to ensure that the bank knows who is ultimately behind the account and where the funds come from, in order to prevent the use of the bank for money laundering or other criminal purposes. Authorized signers on the account or those who have legal title to a controlling share interest in the customer are not necessarily the beneficial owners, as they may act on behalf of others or have limited influence over the account.
1: Wolfsberg Anti-Money Laundering Principles for Private Banking (2012), Section 1.3.1 and 1.3.2, 1 Reference:https://www.wolfsberg-principles.com/sites/default/files/wb/pdfs/wolfsberg-standards/10.%
20Wolfsberg-Private-Banking-Prinicples-May-2012.pdf(2)

Along-term, root cause-based approach ensures AML deficiencies are fully remediated.
* Option C (Correct):Addressing root causes ensures the institution remains compliant and prevents recurring violations.
* Option A (Incorrect):Consulting with an FIU is unnecessary for internal remediation plans.
* Option B (Incorrect):Short-term fixes do not resolve systemic AML issues.
* Option D (Incorrect):AML compliance improvements may require investment-cost-cutting should not compromise compliance.
Best Practices for AML Audit Remediation:
* Conduct root cause analysis before implementing corrective measures.
* Develop a long-term compliance improvement plan.
* Allocate sufficient resources for sustainable AML enhancements.
Reference:
FATF Recommendation 18 (AML Compliance & Internal Controls)
Wolfsberg Group Guidance on AML Audit Remediation
Basel Committee's AML Risk Management Guidelines

The compliance officer should evaluate the request, determine whether it is valid, and provide the necessary information, subject to management approval. It is important to follow the bank's policies and procedures for responding to law enforcement requests, including verifying the authenticity of the request and the identity of the officer making the request. Additionally, it is important to protect customer privacy and ensure that sensitive information is not released to unauthorized individuals. (Reference: Certified Anti-Money Laundering Specialist (the 6th edition), Chapter 6)