An engineer designed a ball so that when it was dropped, it rose with each bounce exactly one-half as high as it had fallen. The engineer dropped the ball from a 16-meter platform and caught it after it had traveled 46.5 meters. How many times did the ball bounce ？（）

A. 5

B. 6

C. 7

D. 8

E. 9

黄色的对比色是（），它是由红色和（）色混合而成的。