Ron Has Recovered from a Bullet Wound That He Suffered

Ron has recovered from a bullet wound that he suffered as an innocent bystander during a violent bank robbery.But he has begun to experience trouble sleeping,is easily startled,and feels increasingly detached from his family and friends.Ron is most clearly showing symptoms of

A) agoraphobia.
B) social anxiety disorder.
C) posttraumatic stress disorder.
D) survivor resiliency.