What Is the Difference Between Chronological Age and Functional Age

Multiple Choice

What is the difference between chronological age and functional age?

A) Chronological age is the time between birth and puberty, while functional age is the time between puberty and reproduction.
B) Chronological age is the degree of aging in the telomeres of each cell, while functional age is how active the cells are.
C) Chronological age is what the calendar says you are, while functional age is the age at which you feel and are capable of functioning.
D) Chronological age is your physiological age, while functional age is the length of time you've been functional.