Which of the following could be classified as habituation?
A) You enter a room and hear a fan motor. After a period of time, you are no longer aware of the motor's noise.
B) You hear a horn while driving your car. You step on the brakes but notice the sound came from a side street. You resume your previous speed.
C) One morning you awake to a beep-beep-beep from a garbage truck working on a new early morning schedule. The next week the garbage truck arrives at the same time and makes the same noise, but does not wake you up.
D) A and C only
E) A, B, and C
Answer: D