Which Description of Behavior Is Most Consistent with a More

Which description of behavior is most consistent with a more severe mental disorder?

A) ​skipping a few classes and feeling somewhat unmotivated to study
B) unable to get out of bed, eat, or leave the house, along with a lack of energy and frequent crying
C) going to classes and making yourself studying for the next round of tests
D) ​going to classes, but having some trouble studying and wanting less contact with others