Which of the Following Statements About the "Random Events" Theory

Which of the following statements about the "random events" theory of biological aging is true?

A) Genetic engineering that manipulates telomere activity has extended the lifespan of human cells.
B) Animal studies confirm an increase in DNA breaks and deletions and damage to other cellular material with age.
C) Because longevity tends to be a family trait,environmental factors have minimal impact on the aging process.
D) Humans who maintain higher levels of physical activity over several decades reduce their maximum lifespan.