Respuesta :
The best fluid source for casual exercisers to replace lost body fluid is Plain water.
Why is plain water the best?
The researchers found that the participants who drank the most plain water in their daily diet consumed fewer total calories, drank fewer sweetened beverages, and took in less total fat, saturated fat, sugar, salt, and cholesterol.
Thus, option "D" is correct.
To learn more about plain water click here:
https://brainly.com/question/18763093