Bob Is Mildly Depressed

Multiple Choice

Bob is mildly depressed. Because of his generally negative attitude and hopelessness, Bob's friends, who typically enjoy his company, no longer want to spend time with him. The impact of Bob's depression on his friends is an example of

A) environmental factors affecting biological factors
B) biological factors affecting behavioural factors
C) behavioural factors affecting environmental factors
D) behavioural factors affecting biological factors