Identify the sentence that has the relative pronoun underlined and is punctuated correctly.

A) Be sure to secure all the food, in the cooler, that is in the car.
B) The campsite, that is at the far side of the lake, is close to the beach and has the best shade.
C) You should let Roger, who is the most experienced camper, pitch the tent.
D) Our sleeping bags which can zip together to make one big blanket still need to be packed.