Support groups are important to victims of PTSD because: A. sharing experiences gives group members a common bond.
B. increased stigma comes from sharing experiences.
C. people with PTSD rarely use support groups.
D. groups are not emotionally safe for people with PTSD

A. sharing experiences gives group members a common bond

Explanation:

Post-traumatic Stress Disorder or PTSD is a health condition that interferes with a person's normal functioning in life. This is caused by a frightening event that an individual may have seen or experienced.

Support groups provide therapy to the person suffering from PTSD. It gives him a form of validation that he's not suffering alone. People in the group understand what he's feeling because they, too, are experiencing it. This gives all of the group members a common bond and helps them overcome negative effects of the disorder.