A cell reference is also called a cell address.
The answer that isn't an example of plagiarism would be 'D. Quoting with Source' that means you are giving credit where credit is due and not taking or copying other work which is the definition of plagiarism.
I'm not sure about the second one but I believe it might be 'A. Students and Teachers'.
Hope this helped!
The standard (and default) port for HTTP<span> servers to listen on is 80, though they can use any port. </span>HTTP<span> is based on the </span>TCP/IP protocols<span>, and is used commonly on the Internet for transmitting web-pages from servers to browsers.</span>
