Manhattan GMAT offers but one approach to CR questions. While many students thrive from their systematic, diagram-based approach, others, such as you, may not.
Other approaches included deconstructing the problem verbally. I have noticed many students can get lost in the words and lose sight in what the argument is saying.
First off you should be able to identify the question type. Next you should be able to re-phrase/simplify the argument in your own words and then anticipate the answer by asking, “An answer choice is one that must…”
Of course, getting to this point isn’t always easy. It sounds like you are still struggling identifying the logical gaps in the argument. The following video should be very helpful.
Common Argument TypesWe offer a dozen more such critical reading lessons and more than one hundred critical reasoning questions to practice your newfound skills! Each question simulates the GMAT computer interface and comes with a video explanation.
Let me know if you have any more questions!