Answer: activist strategy.

**Explanation:** The correct answer is **A (activist strategy)**. Activist strategies fall under the category of event-driven strategies, where fund managers seek to profit from specific catalyst events, such as changes in corporate structure (e.g., acquisitions or restructurings). By acquiring significant equity holdings, activist fund managers gain the influence necessary to shape a company's policies or strategic direction, effectively creating their own catalyst for value realization. - **B (market-neutral strategy)** is incorrect because this strategy focuses on maintaining a neutral exposure to market risk by taking offsetting long and short positions in equities. It relies on identifying mispriced securities rather than influencing corporate policies. - **C (merger arbitrage strategy)** is incorrect as it involves profiting from the price discrepancies between the announced takeover price and the market price of the target company's stock, without any intent to influence corporate policies.

Author: LeetQuiz Editorial Team