In SC questions on MGMAT test you find the following
"(A) This choice is incorrect as it repeats the original sentence."
1. It should not be incorrect because it's answer choice A which repeats the original sentence; the original sentence could be correct on the GMAT. This approach is confusing.
2. If it's incorrect I'd prefer to know why it is incorrect (parallelism, wrong use of like/such as, both...and) instead of having the following answer:
"(A) This choice is incorrect as it repeats the original sentence."