Which of these materials on the walls of a room would work best to keep sound from making an echo?
A B C D
marble carpet wood glass
Question: Which of these materials on the walls of a room would work best to keep sound from making an echo?
(A) marble
(B) carpet
(C) wood
(D) glass

Answer: (B) carpet
Answer: (D) glass
Question: Which of these materials on the walls of a room would work best to keep sound from making an echo?
(A) marble
(B) carpet
(C) wood
(D) glass
Answer: (B) carpet