Adebisi,
I guess what you presented is a critical reasoning question, no?
You've read
MGMAT guides multiple times -- but this leads to no increase in score.
So wouldn't this logic suggest for you to try something else?
You should research your options as there are many out there. Certainly things that are free provide good value. You should try the
practice pill platform from GMAT Pill as well as the variety of free PDFs and sample videos they provide. THere's a month study plan that may suit your needs if you want to know exactly what to do in what order. Google it.
I'd say the sample videos can provide some unique insight. The GMAT Pill
RC Videos catch a lot of people's attention because reading is not just a good skill to have for the GMAT. It's a good lifelong skill set -- and schools don't really do a good job of teaching this. GMAT Pill's RC videos really teaches you how to read long passages and comprehend them for the purposes of business and for the purposes of understanding communication. Reading passages, after all, are messages that authors want to convey. So what exactly did authors want to say? You have to constant keep an eye out for that voice or opinion -- and find keywords in the passage to confirm that you're following what the author is saying.
Hope that helps.