Which statement best describes the scientific rationale for administering calcitriol (Rocaltrol), a vitamin D analog, to a client in end-stage kidney disease? 1. This medication increases the...

Which statement best describes the scientific rationale for administering calcitriol (Rocaltrol), a vitamin D analog, to a client in end-stage kidney disease?

1. This medication increases the availability of vitamin D in the intestines.

2. This medication stimulates excretion of calcium from the parathyroid gland.

3. The medication helps the body excrete calcium through the feces.

4. This medication increases serum calcium levels by promoting calcium absorption.