Which Is NOT True of Stepfamilies

Which is NOT true of stepfamilies?

A) As of 2007, approximately 6% of U.S. children lived in a household with a stepparent.
B) The entry of a stepparent into a family is often very threatening to a child.
C) Young children tend to accept stepparents more easily than do older children.
D) Stepmothers generally have less difficulty with their stepchildren than do stepfathers.