Answer:
C
Explanation:
A isn't short term because lung cancer doesn't go away in a week.
B isn't short term because heart disease lasts for a long time.
D isn't short term because coughing (Smoker's cough) lasts forever. It's impossible to get rid of the cough.
So, C is the answer.
Be patient, Read, Eat healthy, Sleep 8 hours, Stay hydrated, Good hygiene, and just take care of yourself. Hope this helped!