Jack is testing how sound travels. Damon stood on the opposite side of the room and whispered a sentence to him. Then, Jack held a balloon to his own ear as Damon whispered the sentence to him again. Jack heard the sentence better the second time. How did the balloon affect the sound of Damon's whisper? A) The balloon is made of latex, which is a rubber-like material that can make sounds seem louder than they really are.
B) There is no air pressure inside the inflated balloon, so it creates a vacuum that makes the sound seem louder.
C) The air pressure inside the inflated balloon is less than the pressure inside Jacks's ear, making the sound echo the second time.
D) Sound travels better through the compact air molecules inside the balloon than the less-compact molecules on the outside.