Answer: lockup period.

**Explanation:** - **Option A (gate):** Incorrect. A gate is a restriction imposed by the fund manager, applicable to all investors for a limited time, independent of any lockup period. It is not specific to new investors. - **Option B (notice period):** Incorrect. A notice period allows hedge fund managers to liquidate positions in an orderly manner by providing advance warning of withdrawals. It applies to all investors, not just new ones. - **Option C (lockup period):** Correct. A lockup period is a designated timeframe during which new investors cannot withdraw their capital. This ensures the fund manager has sufficient time to execute and potentially realize the strategy's expected results, aligning with the fund's investment goals.

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