Celeste met her current romantic partner through a group of friends. They started talking more when the group would meet up at the mall, and last month they double-dated to go to dinner and a movie. This week they are going to play putt-putt golf alone. Which type of relationship does their coupling pattern suggest they might be in?
a. Casual relationship
b. Cohabiting relationship
c. Serious committed relationship
d. Friends with benefits relationship