In order to answer this question, we should know what a pandemic means: it means a global epidemic.
A lot of epidemics are very local, for example Malaria is limited to places where mosquitoes are very active.
HIV/AIDS can be found in all parts of the world, so that makes it a pandemic - it goes everywhere humans go, because it can survive in all conditions where humans live
I think it's B, it just makes the most logical sense to me.
C. You cannot prevent muscle mass loss as you age, however you can slow the rate of muscle loss, and even increase muscle mass in some instances.
True because you can take medicine or vaccines which are prevention methods from certain sicknesses
Weight that is below the desirable body weight is under-weight :]
