a. celebrity endorsement
Scroll down for the answer.
To get this question, you must first recognize that this is an allusion (reference) to the movie ET. There is a very famous scene of the kid riding his bike through the air in front of the moon.
A DVR allows a person to watch a recording anytime they want to, so the ad changes the setting of the scene to daytime to show this.
b. is the correct answer.