As Measured by the Conflict Tactics Scale, Strauss and Gelles

As measured by the Conflict Tactics Scale, Strauss and Gelles found that

A) The incidence of mutual violence is greater than the incidence of either wife only or husband only violence.
B) Husbands and wives are about equally violent toward their partners.
C) Husbands are considerably more violent toward their wives than are wives toward their husbands.
D) Both (a) and (b) above.
E) Both (a) and (c) above.