Research on the Association Between Depression and Cancer Has Found

Research on the association between depression and cancer has found that

A) there is a modest but questionable association between depression and cancer mortality.
B) decreasing depression scores are associated with significantly longer cancer survival.
C) there is little research supporting the notion that depression is linked to cancer progression.
D) elevated neural endocrine responses associated with depression are unrelated to cancer development.
E) increased levels of depression significantly increase the spread of cancer.