Official Explanation
Identify the Question Type:
This question asks for an additional premise, or evidence, to make the conclusion more likely to be true. This is a Strengthen question.
Untangle the Stimulus:
The casinos have two categories of games: card games, in which shills forfeit all winnings, and slot machines, in which shills keep all winnings. The conclusion states that shills should keep winnings from "Chicken."
Predict the Answer:
For this conclusion to follow logically from the evidence, "Chicken" must be more like a slot machine than like a card game. Look for the answer choice that gives evidence that it is.
Evaluate the Choices:
(E) gives a reason that "Chicken" is more like slots than card games games-it's based on luck rather than skill. Therefore, it's the correct answer.
(A) gives a reason why casinos would not want to let shills keep winnings from card games, but this tells nothing about whether "Chicken" should be treated like a slot machine rather than a card game.
(B) is the opposite of the prediction; it shows a difference between "Chicken" and slots rather than a similarity.
(C) does not help categorize "Chicken"; in fact, it doesn't even mention it. Thus, it would do nothing to strengthen a conclusion about such a game.
Finally, (D) provides another difference between slot machines and "Chicken". Such a difference would contradict the author's assumption rather than strengthen it.
TAKEAWAY: When the right answer needs to compare two things, eliminate any answer that doesn't mention one of them.