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　　10.   EXAMPLE 17.5: PROFITS FROM DYNAMIC HEDGING
　　A trader buys an at-the-money call option with the intention of delta-hedging it to maturity. Which one of the following is likely to be the most profitable over the life of the option?
　　A.     An increase in implied volatility.
　　B.     The underlying price steadily rising over the life of the option.
　　C.     The underlying price steadily decreasing over the life of the option.
　　D.     The underlying price drifting back and forth around the strike over the life of the option.