What Do Scientists Actually Know About the "Infidelity Gene

What do scientists actually know about the "infidelity gene?"

A) Men who cheat on their wives are more likely to have this gene.
B) The presence of this gene in men or women leads to less satisfaction with their mates.
C) Species of monogamous mouse-like voles don't have the gene, while more promiscuous species of the voles do.
D) Getting tested for this gene will give you an indication of whether you are likely to stay married to one person for life.
E) People who lack the infidelity gene are uninterested in sexual gratification.