We Can Determine Whether a Sound Is Coming from a Source

We can determine whether a sound is coming from a source close to us or a source far away by attending to the difference between

A) sounds heard immediately and reflected sounds heard later.
B) the response in the left ear and the response in the right ear.
C) the responses by the hair cells close to the stirrup and the responses by hair cells farther away along the basilar membrane.
D) the loudness at the beginning of the sound and the loudness one second later.