Engine noise from boats travelling through killer whales' habitats ranges in frequency from 100 hertz to 3,000 hertz,...

Skylar on June 11, 2020

@Lucas, yes! (C) is the correct answer here. Please let us know if you need any further explanation as to why it is correct.

on January 15, 2021

At first I eliminated C thinking it was an redundant answer. But upon further inspection, I saw that the "impairment" talked about dealt with their hearing, not the ability to communicate thus making C not a redundant question and therefore the correct answer.