Which of the Following Could Be Characterized as an Illustration

Which of the following could be characterized as an illustration of a process of biocultural adaptation?

A) The inability to digest milk after reaching adulthood.
B) Someone shifting from an integrated, self-contained self to a divided self when using virtual reality games.
C) A person who expresses his or her social, political, or economic suffering through bodily illnesses.
D) Changes in gene frequency in a population that result from the process of natural selection influenced by long-term changes in patterns of human behavior acting on genes that affect human health.
E) An adjustment by a group of organisms that undermines their ability to cope with environmental changes.