C. Facts can be proven true or untrue, opinions cannot be proven true or untrue.
Fact is something true no doubt that can be proven. an opinions is your own views on something.
Explanation:
sends the vibrations to three tiny bones in your middle ear. make the sounds louder and push them to the inner ear, or cochlea. fluid vibrates a series of tiny hairs called cilia, which are attached to auditory nerves. the sound to the brain which turns it into the sounds we hear.
By supporting his argument with an account of personal experience so we will trust him