Josh is a hockey player on his university's team. He practices four times a week with his team and sometimes attends Friday night open skate with his friends. If Josh decides to attend the Friday night skate, the cost is $5. Which of the following is economically true regarding Josh's decision to join his friends on Friday night?
A. Josh will only attend Friday night skate if there is no charge, a fifth time skating will not benefit him at all.
B. Since Josh already skates four times a week with his hockey team, he will never choose to skate a fifth time that week.
C. If Josh decides to join his friends, he must feel that he gains at least $5 in fun by attending a fifth weekly session on the ice.
D. Josh should never attend Friday night open skate--he could get hurt and jeopardize his hockey career.