Explanation

According to the CFA Institute Standards of Professional Conduct, particularly Standard VI(A) - Disclosure of Conflicts, members must make full and fair disclosure of all matters that could reasonably be expected to impair their independence and objectivity or interfere with their duties to their employer, clients, and prospective clients.

Why Option A is correct:

1. Disclosure is required: Tsang must disclose his significant ownership in Outback Mines to both his employer and clients. This allows them to assess the potential conflict of interest.
2. Full disclosure principle: The Standards require disclosure of any beneficial ownership of securities that could reasonably be expected to create a conflict of interest.
3. Transparency: By disclosing, Tsang enables his employer and clients to make informed decisions about whether he should write the report or if additional safeguards are needed.

Why Option B is incorrect:

• While selling the stock would eliminate the conflict, it may not be practical or necessary. The Standards don't require divestment as a first step; disclosure is the primary requirement.
• Forced selling could create tax consequences or other financial disadvantages for Tsang.

Why Option C is incorrect:

• Refusing the assignment might be appropriate in some cases, but it's not the "most appropriate" initial action. Disclosure should come first, and then the employer can decide whether to reassign the task.
• The Standards don't automatically require refusal; they require disclosure and reasonable steps to manage conflicts.

Additional considerations:

• After disclosure, Tsang's employer might decide to have another analyst review his work, implement additional supervision, or reassign the task.
• The disclosure should be prominent and clear, not buried in footnotes.
• Tsang must also ensure his analysis remains objective despite his personal investment.

CFI Standard VI(A) Reference: "Members and Candidates must make full and fair disclosure of all matters that could reasonably be expected to impair their independence and objectivity or interfere with respective duties to their clients, prospective clients, and employer. Members and Candidates must ensure that such disclosures are prominent, are delivered in plain language, and communicate the relevant information effectively."