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Answer: B. While manufacturing has led to...
Explanation: The word while is a transitional conjunction, and is backed by the conclusion's point which is otherwise stronger. It is no different than using despite, as it was used in the first paragraph.
The phrase "while manufacturing has led to" shows the transition in the passage. Thus, option B is correct.
What is a transition in a phrase?
Transitional words help readers to connect with the idea of a passage and relate them to key features or conclusions of the passage.
In option 2, the sentence starts with "while" which is a transitional conjunction supported by the conclusion "strong effect".This transition can be found at the start of the second paragraph or at the end of the first paragraph.
Therefore, option 2 shows a clear transition from the phrase.
Learn more about transition words, here:
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