Conflicts Among Grade-School and Adolescent Siblings _____

Conflicts among grade-school and adolescent siblings _____ .

A) are less frequent than conflicts among toddler and preschool sibs
B) are often intense and not resolved amicably
C) are less frequent than prosocial acts among siblings
D) are less frequent than conflicts among toddler and preschool sibs and are often intense and not resolved amicably
E) are less frequent than conflicts among toddler and preschool sibs and are less frequent than prosocial acts among siblings