Hi Nadia222,

This prompt falls under the category of "Evaluate an argument", which isn't a flaw question. Evaluation question usually use some version of the word "evaluate" in the question stem, so it's understandable that you were initially unsure of what it was asking for. These types of prompts aren't too common on the GMAT (although you'll probably see 1), but they're usually not too difficult either. You need to find the focus/issue of the prompt (here's it's the idea that "faster" may or may not be "better") and pick the answer that matches.

GMAT assassins aren't born, they're made,
Rich