The Ossicles in the Middle Ear

The ossicles in the middle ear

A) Serve to keep the pressure on the two sides of the tympanic membrane equal
B) Are part of the vestibular apparatus
C) Are in direct contact with both the tympanic membrane and the round window
D) Serve to amplify the pressure of sound vibrations from the air in the outer ear to the fluid in the inner ear
E) Are easily damaged by loud sounds