In Analyzing Relationships During Childhood and Looking for Predictors of Future

In analyzing relationships during childhood and looking for predictors of future romantic relationships,

A) the relationship with the same-gender parent is more important than a relationship with age-mates.
B) the relationship with the other-gender parent is more important than a relationship with age-mates.
C) relationships with siblings are the most important predictor.
D) friendships allow children to practice developing intimacy with someone of a similar age.