Question

what is the reason for more kidney stones with age?
a kidney infections
b improper diet
c inadequate fluid intake
d all apply.

Explanation:

Kidney infections, improper diet, and inadequate fluid intake can all contribute to kidney stone formation, and as people age, these factors (or their cumulative effects) can lead to more kidney stones. So all the options A, B, and C are reasons, meaning "All apply" is correct.

Answer:

D. All apply.