Which of the following statements is true？A．The brain of an adult person shrinks 2.5% ever

Which of the following statements is true？

A．The brain of an adult person shrinks 2.5% every l0 years.

B．The cerebrospinal fluid of a person with g years of education may have increased by 17.7 millimeters.

C．The cerebrospinal fluid of a person with 16 years of education may increase by 10%.

D．The brain of an aged person shrinks 5% every 10 years.