Which sentences use subordination to join clauses?
A) Until the waiter came around with the check, we had no idea that we had just spent four hours reminiscing.
B) Though we hadn't seen each other in years, it felt like we had just left each other yesterday.
C) That's what happens with lifelong friends. You may have been apart for years, but you are able to step back into those friendships easily.
D) That's how it felt that night, and I couldn't be more thankful for such great friends.