Which of the Following Statements Is CORRECT

Which of the following statements is CORRECT?

A) call options generally sell at a price less than their exercise value.
B) if a stock becomes riskier (more volatile) , call options on the stock are likely to decline in value.
C) call options generally sell at prices above their exercise value, but for an in-the-money option, the greater the exercise value in relation to the strike price, the lower the premium on the option is likely to be.
D) because of the put-call parity relationship, under equilibrium conditions a put option on a stock must sell at exactly the same price as a call option on the stock.
E) if the underlying stock does not pay a dividend, it makes good economic sense to exercise a call option as soon as the stock's price exceeds the strike price by about 10%, because this permits the option holder to lock in an immediate profit.