Which of the following does not need an outer or middle ear to hear effectively?

Which of the following does not need an outer or middle ear to hear effectively?
A.dogs
B.cats
C.fish
D.All of these need outer and middle ears
The range of human hearing is between ____ HZ.
A.10 and 200
B.10 and 2000
C.20 and 20,000
D.20 and 50,000

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