A garage door opening device has a light near the floor. This light is pointed at a receiver. If a cat runs under the door while it is opening, the garage door stops moving. What property of light applies to this situation? A) The light changes color as it bounces off the cat. B) Light is a wave of energy which is absorbed by objects like the cat. C) Light will change speed when it strikes the cat before it gets to the receiver. D) Light travels in a straight line. The cat blocks the light from getting to the receiver.