C. Spend most of the time alone.
The easiest answer that can be chosen would be C. Spending time alone often worsens stress and will allow your thoughts and feelings to be isolated and not get the reassurance you may need from family or friends. Being a others will often help with stress and improve your overall mental state.
Getting enough sleep is CRUCIAL to management of thoughts and feelings (think about it, when you don’t get enough sleep you get cranky and in a bad mood). Eating a healthful diet will make you feel overall better physically and mentally and your body is getting the correct nutrients it needs to survive, junk food will make you feel oily, exhausted quickly, and overall not energized. Lastly, getting exercise has been PROVEN to reduce stress, if you ever need to get things off your head you should always just take a jog and enjoy the beauty of the outdoors and relax and calm yourself.