Answer:
A. To comply with the new rules while still encouraging cigarette purchases via visual exposure
Step-by-step explanation:
The passage states that when California banned counter displays which were used to exposed people to tobacco and increase the sells, stores decided to put it in transparent displays so they could be seen and from this we can inferred that they did this to be able to continue exposing people to tobacco to maintain the sells and at the same time, comply with the law. Because of this, the answer is A.