Your suitemate has been sad all semester and has cried quite a bit, felt worthless and guilty and is very worried. She also has difficulty sleeping and does not eat much, which has led her to lose quite a bit of weight. What type of depression is she experiencing?

The answer is major depressive disorder.

Explanation:

This condition is characterised by lack of energy to perform regular activities and low self-esteem. Some of its effects include impaired academic or professional performance, and reluctance to sleep or eat normally.

Depression can last from a few weeks to several years, and the symtpoms might always be present or reappear periodically.