Final answer:
An illegible coupon printed in a newspaper represents the best example of noise in the communication process, acting similar to how traffic noise disrupts auditory messages.
Step-by-step explanation:
The best example of noise in the communication process is, 'a coupon printed in the newspaper that is so blurry it is illegible.' Noise in communication refers to any form of interference that disrupts the clarity or reception of a message.
In this context, the illegibility of the coupon functions as physical noise, preventing the intended audience from receiving the information due to a visual distortion, much like loud road traffic can prevent auditory communication. The other options given in the question do not directly interfere with the communication process as effectively as the blurry coupon does.