Leketa is a secret agent. She needs to send secret messages to her partner, Daniel. Leketa uses the sound waves from the beat of a drum to send her messages. Leketa and Daniel create a secret code using a pattern of drum beats to communicate with one another. In which of the following places would using a drum work to send her secret messages? A. The drum will work on Earth, under the water, and in outer space.
B. The drum will work on Earth and under the water. The drum will not work in outer space.
C. The drum will work on Earth and in outer space. The drum will not work under the water.
D. The drum will work under the water and in outer space. The drum will not work on Earth.

Why did you choose your answer to Question 4? Explain in terms of sound waves.