Under the Wolfsberg Correspondent Banking Principles, conducting enhanced due diligence (EDD) is an obligation for correspondent banking clients that present greater risks. This may include conducting additional research and analysis of the client's background, ownership structure, and transactions. EDD may also involve obtaining additional documentation, verifying the client's identity, and conducting periodic reviews to ensure ongoing compliance. The level of EDD required should be commensurate with the level of risk posed by the correspondent banking relationship. Therefore, option B and D are incorrect. Option A is not specific enough to address the question. Option C is the correct answer as it highlights the importance of senior management approval for high-risk relationships, which is a key component of EDD.
Reference: Certified Anti-Money Laundering Specialist (the 6th edition) Study Guide, Chapter 7, page 12.
Wolfsberg Correspondent Banking Principles (2014)

Explanation
While this behavior may warrant scrutiny in certain circumstances, it is not inherently suspicious or indicative of money laundering. In contrast, the other behaviors listed (living beyond one's means, excessive unresolved exceptions, and using company resources for personal gain) may suggest that an employee is engaging in or facilitating money laundering activity.