Research has determined that undergraduate college students tend to behave in similar manners with regards to their credit card usage- Which of the following behaviors are indicative of undergraduate students' credit card behaviors?

Wise ways to use a Credit card are:
Pay off your balance every month. 
Use the card for needs, not wants.
Never skip a payment. 
Use the credit card as a budgeting tool. 
Use a rewards card.
Stay under 30% of your total credit limit.