What Is a Disadvantage of Using Multibeam Echo Systems to Map

Multiple Choice

What is a disadvantage of using multibeam echo systems to map the entire seafloor?

A) It can only detect a single narrow corridor of the seafloor.
B) There are many beams that radiate from the ship's hull.
C) There are very few vessels that are actually outfitted with these systems.
D) The systems send a pulse of sound every ten seconds.