Given the fact "as distance from a source of light increases , that source of light will appear dimmer", what is the answer to the question or completion "A plane takes off from the ground, lights blazing, and flies into the sky. As the plane ascends and travels to its destination,"

pick from the following.
1). the lights are brighter.
2). the lights appear duller.
3). the lights are closer.
4). the lights are bigger.
2).