What Is the Combined Function of the Malleus, Incus, and Stapes

What is the combined function of the malleus, incus, and stapes?

A) to convert the mechanical vibration of the tympanic membrane into a pressure wave in the cochlear duct
B) to amplify the vibrations of the eardrum
C) to convert the oval window's vibrations into vibrations of the tympanic membrane
D) to equalize the pressure on both sides of the tympanic membrane