Multi-choice problem: Choose from the options at the end, and answer how do you do this: To make ice last longer in a cooler.

Possible answers:
A). When you go to the beach and take your cooler with you, sprinkle salt on the ice so that it stays frozen for much longer.;
B). When you go to the beach and take your cooler with you, sprinkle chocolate chips on the ice so that it stays frozen for much longer.;
A).