Suppose you buy a put option with a strike price of $105. If the price of the underlying stock at expiration is $90, which of the following is the best and correct choice?

		a) You should receive a payoff of -$15 by exercising the option.
		b) You should receive a payoff of $15 by exercising the option.
		c) You should receive a payoff of $15 by not exercising the option.
		d) You should receive a payoff of zero by not exercising the option.
		e) You should receive a payoff of $90 by exercising the option.