Nitrogen-15 has ______ protons, ______ neutrons, and ______ electrons.
A) 8 protons, 7 neutrons, 8 electrons
B) 7 protons, 15 neutrons, 7 electrons
C) 7 protons, 8 neutrons, 7 electrons
D) 7 protons, 8 neutrons, 8 electrons