Why are slow-twitch muscles more beneficial than fast-twitch muscles for cardiorespiratory fitness? a. slow-twitch muscles are longer and thicker than fast-twitch muscles. b. slow-twitch muscles need less blood to contract than fast-twitch muscles. c. slow-twitch muscles need more recovery time between exercise sessions than fast-twitch muscles. d. slow-twitch muscles are able to use oxygen more efficiently than fast-twitch muscles. select the best answer from the choices provided.

A is wrong I just took the quiz.                                                       The Correct answer should be D.                   

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.