Sentence Correction is a process of elimination. You do not choose an answer because it is correct, but rather because it is not as bad as the other choices.

Are you focusing on the differences between the answer choices themselves?

Are you sifting through the sentence and skipping over modifiers and prepositions?

Despite the amount of technical language you often see posted on the sentence correction discussion board - the GMAT does not really test grammar - but rather decision making. In sentence correction you are given too many words, too much information, most of it is not necessary.

Don't accept the sentence that they give you. Take it apart and make it your own. Look past the prepositions as if they were not there, ignore modifiers that are properly placed. Focus in on the differences in the answer choices and the portions of the rest of the sentence that allow you to make those choices. The one sure way to be confused with sentence correction is to take the sentence that they give you. Make it your own instead!

Very interesting insight and perspective, David! Thanks!

Thanks a lot David for an interesting insight. I have noticed that when i was practicing sentence correction questions from OG, errors were quite apparent in the problems but in GMAT Prep, it became very difficult to point out errors and jump to the right answer. Thanks for the tip. I will try using the method of elimination and see how it works.