As People Age, What Happens to Their Olfactory Sensitivity

As people age, what happens to their olfactory sensitivity?

A) Olfactory sensitivity is highest as a child, then declines in middle adulthood and old age.
B) Olfactory sensitivity is lowest as a child, then increases in middle adulthood and old age.
C) Olfactory sensitivity is low as a child, high during middle adulthood, and then decreases in old age.
D) Olfactory sensitivity is high as a child, low during middle adulthood, and then high again in old age.
E) Olfactory sensitivity stays at a constant level from childhood to old age.