\#1. (0.5pt.) An American put option gives the buyer the to A) right, buy the underlying asset at the exercise price on or before the expiration date B) premium, sell the underlying asset at the exercise price on or before the expiration date C) right, sell the underlying asset at the exercise price on or before the expiration date D) right, buy the underlying asset at the exercise price only at the expiration date E) premium, buy the underlying asset at the exercise price on or before the expiration date