Answer: C
Explanation: I figure the answer is C. Through the process of elimination, I can remove choice A because that describe thirds parties. Choice D simply doesn't make sense in the context, so it's down to B and C. At this point, using context clues, I can infer that C is the only reasonable option - B refers to two specific political parties (like used in the US) and not just a "two party system" in general. Similarly, common complaints about the two party system are those that claim it is "limiting" and has "fewer choices."