Calcium Balance,an Intake That Equals Excretion,depends Solely on Adequate Calcium

Calcium balance,an intake that equals excretion,depends solely on adequate calcium intake.Although hormones such as PTH are involved in phosphorus balance,hormonal influence on calcium balance is insignificant.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.