Why would a scientist have difficulty using sound waves to measure the thickness of a very wide, solid rock mountain? a. Most of the sound waves would travel too quickly to be detected.

b. Most of the sound waves would not enter the solid rock..

c. Most of the sound waves would travel through the rock and continue moving straight, never to return.

d. Most of the sound waves would lose too much of their energy as they traveled through the rock to return

PLZ EXPLAIN Y THE ASWER IS RIGHT