A biologist is recording the loss of fish in a pond. He notes the number of fish, f, in the pond on June 1. On July 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on June 1. Which equation represents this situation? A. f – 52 = 63 B. f – 63 = 52 C. 63 – f = 52 D. f – 63 = –52