Multi-select problem: How does the next paragraph end?

How to get through a bad day at school 
Take some deep breaths. 
When you notice yourself getting anxious or frustrated, taking some deep breaths is a great first step. You can do it anywhere, even in class.

Choices: a. Remember, there's no " be am " rule in the classroom. Take deep breaths in for three seconds, then release your anxiety.; b. Sit or lie down on the floor, keeping your back straight and your shoulders back. Keeping your eyes closed will make it much easier to sleep.; c. Your teacher and classmates probably won't even notice. Try breathing in deeply through your nose and then breathing out through your mouth.; d. Take a deep breath in and out through your nose, hold it for a few seconds, and then release. Breathe in through your nose for a second and then hold for a short period (30 seconds, for instance), then release to speak to yourself.;
c.