The meaning of the phrase " the tip of the/this iceberg, refers to a small part of a very large or serious problem, so something at the tip of the iceberg is a smaller part of something big.
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Digital TV uses a digital signal, or series of 0s and 1s, and is much clearer and less prone to interference than analog TV.<span> It improves reception, offers better picture and sound quality, </span>
In analog television, in which the video and audio are carried by analog signals. In digital they are carried with digital encoding.
D) To determine which posts from a particular user have received the greatest number of comments
<u>Explanation:</u>
Since social media excepting comments from end user website or social media should keep track of end user information such as name with email address and phone extra.
If we do so we can end user information in cans, end user post, wrong post information can be blocked or given end user information for further analysis. Moreover web site can receive positive or negative posts.
For me all four will be my answer. If we don’t track any information about end user it is against to law.