Extended rest period - positive? Are you soft? D is the best answer as a free lunch is obviously a good thing, and thus positive, and a free lunch from the school makes it extrinsic. You're high.
B - Morbidity has nothing to do with it.
C - You can't pick life expectancy based on mortality rates of one disease.
D - Prevalence refers to how common the disease is. Death rates do not mean an indication of prevalence.
A it is. gg