In an "anti-bonding" orbital between two atoms, the electrons involved in the bond spend "most of their time"
a) in between the two atoms where they act to repel one another
b) on the outside of the molecule where the positive nuclei are more exposed to a repulsive force
c) very nearby and close to their respective nuclei
d) away from the molecule, since in an anti-bonding orbital the electrons are expelled from the atom