Question

is coffee a good source of water? yes, it is more hydrating than tap water. yes, but only if sugar is not added. no, it primarily acts as a diuretic.

Explanation:

Coffee contains caffeine, which is a diuretic. Diuretics increase urine production, so while coffee has water, its diuretic effect means it's not a good source of water for hydration as it can promote fluid loss. The first option is wrong as coffee isn't more hydrating than tap water. The second is wrong because adding sugar doesn't change its diuretic nature related to water source for hydration. The third option correctly states coffee acts as a diuretic, so it's not a good water source.

Answer:

C. No, it primarily acts as a diuretic. (Note: Assuming the options are labeled A, B, C with A as "Yes, it is more hydrating than tap water", B as "Yes, but only if sugar is not added", C as "No, it primarily acts as a diuretic".)