Which of the Following Is NOT a Theoretical Explanation for Biological

Which of the following is NOT a theoretical explanation for biological aging?

A) The effects of age occur when undesirable chemical bonds form between cellular proteins or fats and cause molecules to be unable to assume the correct shape for proper function.
B) Species-specific genes for aging prevent humans from becoming parents when they are too old to be able to raise offspring to maturity.
C) Insufficient production of neurotransmitters interferes with cellular communication and causes cells to age.
D) Cells lose their ability to repair breaks in DNA, and the accumulation of unrepaired breaks results in aging.