Kelly Was Recently Diagnosed with Cancer

Kelly was recently diagnosed with cancer. Her physician recommended that she keep a journal about her feelings and thoughts. Research suggests

A) this is a good idea - emotional disclosure is often effective in improving physical condition.
B) this is neither good nor bad - emotional disclosure has no real impact on physical condition.
C) this is a moderately good idea - emotional disclosure may make her feel better but will have no impact on her physical condition.
D) this is a bad idea - emotional disclosure tends to make people's physical condition worse.