The Development of Colon Cancer Occurs Slowly, and Colon Cancer

The development of colon cancer occurs slowly, and colon cancer is more frequently seen in the elderly than the young. This is most likely because

A) cancer cells don't have mitochondria, so they grow slowly.
B) usually six or more somatic mutations must occur to give rise to the cancer, which takes time.
C) cancer cells have to wait until new blood vessels grow into the area, which takes much time.
D) most cancer mutations interfere with mitosis, so cell division occurs more slowly.