Abraham Spoke So Softly That Jason Rolled a Piece of Paper

Multiple Choice

Abraham spoke so softly that Jason rolled a piece of paper into a funnel shape and put one end into his external auditory canal to signal Abraham to speak up. Abraham then shouted that a certain anatomical structure serves exactly the same function as Jasonʹs paper funnel. That structure is the

A) pharyngotympanic tube.
B) pinna.
C) mastoid antrum.
D) round window.