The two biggest causes of college failure are and a. lack of preparation and lack of money; b. family crisis and financial difficulty; c. lack of skills in college success and lack of motivation; d. loss of self-confidence and not attending sufficient classes; e. too much socializing and not enough studying. the subject for this class isn't listed

The correct options are (A) lack of preparation and money, (D) loss of self-confidence and not attending sufficient classes.

The main way to fail class is by avoiding it, leading to a poor performance on tests.  The lack of preparation when it comes to being organized with your deadlines and assignments is crucial in order to keep track of the multiple classes.