It’s referring to the mirror as your oldest friend. Your oldest friend, the one you’ve known the longest and most are very close to you and it’s warming. They know you well the best and they’re honest, kind, friendly, etc towards you. They give you “a better picture of yourself than a looking glass.”
It means supreme power or authority it depends on how you are using the word
From PurdueOwl.com: “Circular Argument: This restates the argument rather than actually proving it. Example:
George Bush is a good communicator because he speaks effectively.
In this example, the conclusion that Bush is a "good communicator" and the evidence used to prove it "he speaks effectively" are basically the same idea. Specific evidence such as using everyday language, breaking down complex problems, or illustrating his points with humorous stories would be needed to prove either half of the sentence.”
THE ANSWER IS B I HOPE IT IS CORRECT
