Market Buy Order Impact on Best Ask Price - Limit Order Book Analysis

There is not enough information given to determine the answer to this question. The best ask price would depend on the current state of the limit order book for Stock A, which is not provided. For example, if the limit order book has multiple orders at the current best ask price, the market buy order could be filled at that price without changing it. However, if the current best ask price is for a smaller quantity than the market buy order, the order would be partially filled at that price, and the new best ask price would be determined by the next highest ask price in the order book. To accurately determine the new best ask price, the complete limit order book for Stock A is required.