Alex and Faith, Who Attend the Same College, Sometimes Have

Alex and Faith, who attend the same college, sometimes have sex with each other. When people ask if they are a couple Alex and Faith insist that they are just friends. Alex and Faith :

A) are more likely than people in romantic relationships to practice safer sex techniques.
B) by definition have no interest in eventually transitioning to a more stable romantic relationship.
C) likely will have fewer sexual partners in their lives than people who do not engage in this sexual interaction pattern.
D) are engaging in a highly unusual behavior for college students.