With the development in science and technology man can make various flowers（）before their time.

A. It has destroyed more than 100 homes.
B. It has been brought under control.
C. It has probably started by sparks.
D. It was the second largest in size.

A. They must be rich in the knowledge of harmony and rhythm.
B. They should be enthusiastic when composing music.
C. They should follow their intuition to let the music come out naturally.
D. They would perform the music with guidance of formal theory.