Why Do Some Researchers Believe That Natural Blonde Hair Will

Why do some researchers believe that natural blonde hair will disappear as a natural trait within the next 200 years?

A) People with blonde hair are more susceptible to many diseases,including cancer,limiting their ability to reproduce.
B) People with blonde hair are less fertile than people with dark hair.
C) Genes responsible for blonde hair are mutating at high rates.
D) Blonde hair is a recessive trait and social factors,such as mobility,may reduce the likelihood that pairs of individuals,both of whom have genes for blonde hair,will meet,mate,and reproduce.