Exercising regularly. That basically improves everything. Im pretty sure everyone has heard that exercising is good for them. Sleeping in later on the weekends DO NOT HELP. That will disturb the time you do things and ruins your schedule. Making up sleep doesnt work. Scientific studies prove that. And reading a tablet will make you sleepy, but that makes you still awake, so no no no. The radioactive rays from the tablet keeps your brain awake. (another reason why you should sleep nowhere near a tablet).
The answer should be Both A and C Reading clears the mind making it ready for sleep and post-exercise drops the body temperature making it want to sleep
