Whichofthefollowingstatementsabout“草”isNOTtrueaccordingtothepassage?

Whichofthefollowingstatementsabout"shortselling"isTRUE（） A: A short position may be hedged by purchasing put options. B: Short sellers may be subject to margin calls if the stock price increases. C: Stocks that pay large dividends should be sold short before the ex-dividend date and bought afterward to take advantage of the large price decline in a short time period.