When Tumor Cell DNA Is Examined from People at Different

Multiple Choice

When tumor cell DNA is examined from people at different stages of the same cancer type,mutations that are common to all of them

A) act early in the disease.
B) act late in the disease.
C) acted on an initial cell and then reverted to wild type.
D) entered the cells on the same type of virus.
E) are there by coincidence and do not mean anything about the disease.