Fred Runs a Fishing Lodge and Has a Very Profitable

Fred runs a fishing lodge and has a very profitable business during the summer. In the fall, the number of guests at the lodge starts to decline. Fred should keep the lodge open:

A) all year because his summer profits offset any losses he might have in the winter.
B) only during those months in which his total revenue exceeds his total cost.
C) only during those months in which his total revenue exceeds his fixed cost.
D) only during those months in which his total revenue exceeds his variable cost.