Which of the Following Is NOT True Concerning Research on Regret

Which of the following is NOT true concerning research on regret?

A) Research on regret shows that people's greatest regrets in life involve mistakes.
B) Research on regret shows that people's greatest regrets in life involve missed opportunities in close social relationships, such as missing out on time with family or cheating on a romantic partner.
C) Research supports the importance of close social relationships for well-being and the lifelong impact of losing.
D) Research on regret shows that people's greatest regrets in life involve missed opportunities in nonsocial domains, such as work or school.