The nurse teaches the client with peptic ulcer disease about how to effectively adjust his response to work-related stress. Which of the following statements by the client indicates that the education is effective（）
A. "My job is too stressful. I will have to find a different career. "
B. "I don’t have any control over my stressors at work. My coworkers are difficult to work with. "
C. "Well, I guess this ulcer means I won’t be able to work toward a promotion. "
D. "I will have to improve my ability to cope with stress. "