It is A outputting (if you want I can show what it says in the dictionary)
<span>A search engine displays a list of webpage names that contain the search text. The term for that list is hit.
Basically, what this term refers to is the number of visits, or a number of downloads that happened on that particular webpage. It is a good tool to measure web traffic, or how much that page is visited.
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The correct answer is A because they cant protect in real time