Which Person Is Most Likely to Become an Abuser in a Domestic

Which person is most likely to become an abuser in a domestic setting?

A) A spouse who cares for a husband/wife with physical or cognitive incapacities.
B) An adult son who visits but lives in his own home.
C) An adult daughter who shares the care of the older adult with her brothers and sisters.
D) All of the above are equally likely to become abusers of an older adult.