Amanda Has Been Severely Depressed in the Past Year

Amanda has been severely depressed in the past year. She is constantly sad, almost to the point of numbness. She ruminates constantly about what a failure she is and how nothing she does is ever right. She finds it hard to get out of bed and get going. Which of these symptoms is an example of a cognitive symptom of Amanda's mental disorder?

A) constant sadness
B) feeling numb
C) ruminating on her failures
D) difficulty getting out of bed