Thank you for your message concerning question 184 in the Sentence Correction section of The Official Guide for GMAT Review. You indicated that you were confused by the explanation for why option (E) is incorrect. The explanation does contain an error; while a comma before "yet" might be added for emphasis, it is not required because, as you point out, "yet are slipping since then" is not an independent clause. The rest of the explanation does accurately describe the grammatical and rhetorical problems with option (E). Again, thank you for taking the time to point out this error. We are always grateful to receive inquiries such as yours because they help us to improve the quality of our tests and test preparation materials. |