单选题 An investor sold a stock short and is worried about rising prices. To protect himself from rising prices he would place a:

A. stop order to sell.
B. limit order to sell.
C. stop order to buy.

【正确答案】 C

【答案解析】A limit order to sell is placed above the current market price. A stop (loss) order to buy is placed above the current market price. A stop (loss) order to sell is placed below the current market price. A stop order becomes a market order if the price is hit.