The Formation of Protons Over Neutrons (Thus Producing About a 7:1

The formation of protons over neutrons (thus producing about a 7:1. ratio) was favored in the early universe because

A) it takes more energy to create a neutron from a proton than a proton from a neutron.
B) it takes more energy to create a proton from a neutron than a neutron from a proton.
C) the more massive neutrons made better targets for nucleon collisions.
D) the positively charged protons were repelled away from the explosion.