The Figure Above Shows Kaley's Marginal Benefit from Swimming with Manatees

Multiple Choice

The figure above shows Kaley's marginal benefit from swimming with manatees (manatee is another name for a sea cow or dugong) and Scott's marginal cost of providing manatee swimming tours. At 1 manatee swim per week, Kaley's marginal benefit is ________ and Scott's marginal cost is ________.

A) $10, $40
B) $25; $25
C) $40; $10
D) $40; $40
E) None of the above answers is correct.