Which of the Following Would Correctly Be Identified as Due

Multiple Choice

Which of the following would correctly be identified as due to learning?

A) A weight lifter can raise less and less weight as her sets go on.
B) After a growth spurt, a child can now climb on the couch.
C) In the spring, male birds are attracted to females, but not in the fall when the females are not receptive.
D) None of these