Which of the following is true about protein and supplements in diets?
a. everyone needs additional protein in their diet.
b. weight lifters need to include supplements in their diets.
c. it is uncertain whether many dietary supplements are effective.
d. most supplements are known to enhance the benefits of weight training.
select the best answer from the choices provided.

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.