Decay Theory Has a Difficult Time Explaining Three of the Statements

Multiple Choice

Decay theory has a difficult time explaining three of the statements below. Which statement CAN be explained from the perspective of decay theory?

A) A person can swim as a child, doesn't swim for 20 years, jumps in a pool, and can swim.
B) A retired ballerina began dancing as a 4-year-old, and at 70 she remains an effective ballet instructor.
C) A football coach recalls details of a childhood game, but has forgotten the time of tomorrow's practice.
D) A high school Spanish scholar barely uses Spanish for 50 years, and then does well on a Spanish test.