This is a particularly tough question type for many students I've taught. I always find the best thing to do is to (at the very least) break the argument into simpler language so that it's logical mechanics become clearer. I'd recap this argument as below:
-The local station won't win (note to self - this is an extreme statement - they are not saying probably).
-They won't win because they have not won and they are not trying to get better. -Meanwhile their competition is trying to get better.
Notice here that although the conclusion is fairly absolute in its terms, the evidence is not - really only relying on trend data that is more probabilistic than logically certain. Let's keep this in mind as we look at the answer choices.
(A) is not the answer because the conclusion uses "probably" - that means it's not too logically close to our conclusion, which is so certain in its language.
(B) has the same problem as (A). (B) also has a logical problem in itself (the idea of predicting a fair coin with certainty) that we don't have in the original argument.
(C) provides evidence ("all lions are mammals") that is too certain - the evidence in our argument above is more probabilistic than certain.
(D) looks great and is our answer. It uses probabilistic/trend evidence to get to a certain conclusion.
(E) has the same problem as (C).
This is a tough problem. It would be worth doing this problem more than once to make sure you really understand it, and better than that, that you could explain it to a friend. Please follow-up if you have specific questions about this problem. We are always happy to have more student input on our forum