Answer: The correct answer is "stop-buy order with a specified purchase price of $55 per share.".
Explanation: An investor sold a stock short a year ago for $50 per share. The stock's price is currently $52 per share. If the investor is unwilling to accept a loss of more than $5 per share on the short sale transaction, she could place a stop-buy order with a specified purchase price of $55 per share.
In this way there would be a difference of $ 5 between $ 50 and the specific purchase price of $ 55 and placing a stop-buy order on that price per share so as not to lose more than $ 5 per share.