A necessary condition for the early exercise of an American put option is that: 21 Not yel Marked P Flag Select one: O a the value of the American call greater than the exercise price. O b. the value of the American call greater than the corresponding European put option. Od the value of the American put is greater than the corresponding European put option. d. the value of the American put is less than the corresponding European put option the value of the American put is less than the corresponding European call option O e