Sound travels in waves. Sound waves cannot travel through?

A) Air

B) Solids

C) Space

D) Water

The answer is c. Space isn’t uniform nothingness. It’s full of stuff. In between the stars, there are clouds of gas and dust. These clouds are sometimes the remains of old stars that went out in a blaze of explosive glory, and they’re the regions where new stars form. And some of that interstellar gas is dense enough to carry sound waves, just not sound perceptible to humans.