In the sentence "Using a moderately powerful desktop computer running a music composition program and a '500 synthesizer" (paragraph 2) , the word "moderately" has the meaning of ______.

A．Filial responsibility in Singapore is enforced by law.
B．Fathers have legal obligations to look after their children.
C．It is an acceptable practice for the old to continue working.
D．The Advisory Council was dissatisfied with the problems of the old.

A．play an insignificant role in solving social problems.
B．are helpful to the elderly when they sue their children.
C．are very important in preserving Asian uniqueness.
D．are significant in helping the Bill get approved.