Can anyone plz help fast and with the right answers Biology >

Phosphorus (P) is the element with the atomic number 15. Which of the
following correctly compares 31 and 32p, which are two isotopes of
phosphorus?

A. Both isotopes contain 15 protons.

B. 31P has 30 protons, whereas 32p has 31 protons.

c. 31p has 31 neutrons, whereas 32P has 32 neutrons.

D. Both isotopes contain 17 neutrons.