Which of the Following Situations Best Illustrates That the Environment

Which of the following situations best illustrates that the environment can contribute more to a trait than heredity?

A) A child whose birth mother was emotionally stable shares the mood swings of his adoptive mother.
B) A biological father and son are both disorganized.
C) Fraternal twins share the same offbeat sense of humor.
D) Identical twins who were raised apart are both extraverted.