Which of the Following Is Believed to Be the Key

Which of the following is believed to be the key reason why men in the United States often go without psychological treatment?

A) Psychotherapy is less effective for men than it is for women.
B) Psychological problems tend to be less severe for men than for women.
C) Men often believe that seeking treatment conflicts with masculinity.
D) Psychological problems are more likely to resolve on their own for men than for women.