Medical experts say that drinking water is an excellent way to stay healthy. keeping yourself hydrated improves internal functions. it also promotes mental clarity and focus. as a bonus, skin elasticity is improved to prevent premature aging.

which sentence would most logically conclude this paragraph?

a) who are these experts?
b) cold cream keeps skin from wrinkling at an early age.
c) drinking too much water can cause a condition known as water intoxication.
d) obviously, drinking water is good for the inside as well as the outside of the body.