Answer :
[A] Transverse; crest
Longitudinal waves to not rise above equilibrium, transverse do. Additionally, the highest point of a transverse wave is called the crest, where similarly, the lowest point is called the trough.
Longitudinal waves to not rise above equilibrium, transverse do. Additionally, the highest point of a transverse wave is called the crest, where similarly, the lowest point is called the trough.