This is a Sentence Replacement Question. We will USE each of the answers in context to see what works. We are looking for something that leads into the next sentence and links with assembling cork.
Answer A – No change. ELIMINATE A because this does not work in context with the next sentence, which describes how Pollack assembled corks.
Answer B ELIMINATE B because this does not lead into the next sentence in context.
Answer C ELIMINATE C because this does not lead into the next sentence in context.
Answer D KEEP D because this provides the proper lead into the next sentence about how he assembled corks.
The Correct Answer is