Nisha0987
For option no. D has never been exercised, whereby each of the three co-owners is required to offer to sell his or her portion of company stock to the other co-owners before making it available. Why is this incorrect?
Hi Nisha, "whereby" means "by which". Such structures mark the start of a "dependent clause".
So basically, D does not have any "independent clause", whereas every complete sentence must have at least one independent clause.
To summarize, D is not a complete sentence!
As an aside, if you are just starting to prepare for GMAT, it would really be beneficial for you to invest time and effort towards building
fundamentals (in topics such as Independent clauses, Dependent clauses, Phrases, conjunctions etc. A
practice heavy approach, generally doesn't yield great benefits.
You can watch our
video on
Independent and Dependent clauses here.
p.s. Our book
EducationAisle Sentence Correction Nirvana discusses
Independent and Dependent clauses, their application and examples in significant detail. If you or someone is interested, PM me your email-id; I can mail the corresponding section.