45. The mature person is no longer primarily a receiver. He receives but also gives. His giving does not depend on his expectation of return. It is giving for its own sake. Giving and producing are not seen by the mature person as a duty; _________ Just as for the growing child, receiving love and help are the main sources of pleasure, for the mature person pleasure consists primarily in spending his energies productively for the sake of other persons and for outside aims.
(A) he should have a sense of responsibility, honesty, and courage.
(B) he gives and produces his energies with pleasure for selfless service.
(C) everyone works hard and asks for no return in helping others.
(D) a receiver sometimes plays the role of a giver depending on the return.