Two Tones Are Presented Simultaneously to a Listener

Two tones are presented simultaneously to a listener. Specifically, C4 is presented to the left ear while C5 is presented to the right ear) . Then, the two tones are again presented simultaneously to the listener, but this time the tones are switched so that C5 is presented to the left ear while C4 is presented to the right ear.
i. After repeating this auditory pattern for a few trials, listeners report
hearing:

A) C4 in the left ear and then C4 in the right ear (with this pattern repeating)
B) C5 in the left ear and then C5 in the right ear (with this pattern repeating)
C) C4 in the left ear and then C5 in the right ear (with this pattern repeating)
D) C5 in the left ear and then C4 in the right ear (with this pattern repeating)