I believe the correct answer is the sentence about snow cones.
If you would like my reasoning on why the others are incorrect please respond saying so and I will get back to you as quickly as I can.
Hope this helps.
The topic sentence of the following paragraph would be A. Chess is a challenging game that can be a lot of fun once someone learns to play.
The correct pronoun for this sentence would be to use he or she instead of him and her. To state things clearer, let's try to take out the word "either" and use he and she in the sentence. So doing that, we will have "he could help you" that makes more sense that "him could help you". Do the same for she and her.
