Which of the Following Statements About Sibling Rivalry in Middle

Which of the following statements about sibling rivalry in middle childhood is true?

A) Sibling rivalry tends to decrease in middle childhood as siblings rely on each other for companionship.
B) For same-sex siblings who are close in age, parental comparisons are more frequent, resulting in more antagonism.
C) Single parents and parents with marital conflicts tend to be more careful about being fair to each individual child.
D) To reduce sibling rivalry, siblings should strive to select the same athletic and extracurricular pursuits.