As a portfolio manager, you are tasked with executing a large trade for a client who wishes to liquidate a significant position in a low liquidity stock. Given the challenges associated with trading illiquid securities, it is crucial to employ effective execution strategies. Discuss at least two execution strategies that could be utilized in this scenario. For each strategy, explain the rationale behind its selection, potential advantages, and any drawbacks associated with its implementation.
Additionally, consider how you would adjust your execution strategy if market conditions changed during the trading process.