Your mother has quite a bit of gray hair. She told you that she first started getting gray hair when she was 32 and it keeps getting grayer each year. Which of the following explains why your mother's hair keeps on graying?
a. People who gray prematurely experience more graying than others who gray later in life.
b. Gray pigments occur more frequently in older adults.
c. Gray pigments are more concentrated in fair-skinned older adults.
d. As we age, there is a loss of pigment that provides color to hair.
Answer: D
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