Which of the Following Is True with Regard to Stepfamilies

Which of the following is true with regard to stepfamilies?

A) Infants and preschoolers are the largest group of children growing up in stepfamilies.
B) A vast majority of stepfamilies succeed in providing a stable family environment.
C) Three common types of stepfamily structure are (1) stepfather,(2) stepmother,and (3) blended or complex.
D) The largest number of stepfamilies are preceded by death of a spouse rather that differences between partners leading to a divorce.