Starting at the age ____ our organ systems lose about ____ percent of their function each year.
a. 20; 1
b. 20; 2
c. 30; 1
d. 30; 2
Answer: C
Starting at the age ____ our organ systems lose about ____ percent of their function each year.
a. 20; 1
b. 20; 2
c. 30; 1
d. 30; 2