If John's Marginal Utility Derived from the Consumption of Another

If John's marginal utility derived from the consumption of another candy bar is 1 and the price of the candy bar is $1.50, then

A) this is the last candy bar John will purchase since the marginal utility is less than the price.
B) the opportunity cost of the candy bar is less than $1.50.
C) if John purchases and consumes the candy bar his total satisfaction will go down because the marginal utility is less than the price.
D) there is not enough information to determine if John will or will not purchase the candy bar.