An adult, who is one of identical triplets, develops breast cancer at the age of 54.Neither of the other two identical siblings develops breast cancer.This scenario supports the notion that cancer development is
A) always dependent upon germ line mutations.
B) usually due to expanding triplet repeats.
C) only caused by somatic mutations.
D) usually caused by interactions of many genes/proteins with one or more factors in the environment.
E) due to inversions.
Correct Answer:
Verified
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