According to Research,which of the Following Is True of the Romantic

According to research,which of the following is true of the romantic and nonromantic relationships of single adults?

A) People who reach sexual intimacy quickly are more likely to be in romantic relationships.
B) Sexual activity in nonromantic relationships is associated with high relationship quality.
C) People who have had more prior partners are more likely to be in nonromantic relationships.
D) Reduced investment increases the likelihood that the relationships will become more intimate.