I could also use help here. Also, the correct answer is missing some wording on my iPad.

No worries! So if you click on Alex07's question from 11/06/2013, you'll see our response. Make sure to always check if there's already an answer by clicking on the previous question (if there is one). Hope it's helpful! Let us know if you have any other questions.

could you explain answers A through E? I am having difficulty grasping the concept of this question.

@DanielDePasquale Let's look at the argument structure to see if we can spot the error. The prompt says X is more expensive than Y initially. X uses less of a resource than Y, so after a certain time, the price breaks even. The break even comes quicker when the resource is cheaper. (This is an error in reasoning.) If we look through the prompts, we see a similar structure in C! But, let's glance at the others, too, to see if their structure ends up with a similar error. A - Different kind of conclusion. B - Different kind of conclusion; about justifying a purchase. D - Normative conclusion about how something should be done. E - Also normative, about what someone should choose. See how those are different from C and the prompt?