Price at which European and American options can be exercised is classified as

The correct answer is: Both A and B

The exercise price, also known as the strike price, is the price at which the holder of an option can exercise the option. The horizon price is the price of the underlying asset at the expiration date of the option.

In a European option, the holder can only exercise the option on the expiration date. In an American option, the holder can exercise the option at any time up to and including the expiration date.

Therefore, the price at which European and American options can be exercised is the exercise price, which is also known as the strike price.