Although reclusive author Harper Lee wrote just one book in her lifetime and that book is widely considered a masterpiece. lifetime and that book lifetime and it lifetime, that book lifetime; it lifetime; that book

Would go with (c) because the "although" at the beginning requires a ',' not and or ';'. What's the OA?

Although needs a comma to show the clear change. C is my pick

C.Reasons same as written above.OA??

In C what is "that" referring to?

IMO THAT is qualifying the book.. C is Correct

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