A Person's Marginal Growth (In Height) Decreases as They Age

Multiple Choice

A person's marginal growth (in height) decreases as they age because

A) people grow more quickly when they are younger.
B) older people prefer Pepsi over Coke.
C) our parents lose their ability to measure us as we get older.
D) circumstances change as we age.
E) total growth is decreasing; we begin to get shorter once we get old enough.