Stable Isotopes with Low Atomic Numbers Have an N/Z Ratio

Multiple Choice

Stable isotopes with low atomic numbers have an N/Z ratio of 1. What does that imply?

A) The number of neutrons equals the number of protons.
B) The number of neutrons equals the number of electrons plus protons.
C) The number of protons equals the number of electrons.
D) The atomic number equals the atomic mass.
E) The number of protons equals the number of electrons plus neutrons.