Final answer:
To search for the phrase 'difference in understanding' in the exact order on the Internet, use the search expression "difference in understanding".
Step-by-step explanation:
To force a search engine to return only the exact pages that contain the phrase 'difference in understanding' in the exact order specified, you should use the search expression "difference in understanding". Putting the phrase within double quotation marks tells the search engine to look for those exact words in that exact order. Using single quotation marks (option B) or no quotation marks (option A) will not ensure the exact order.
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