Which of these symbols is a special character that is accessible only from the symbol dialog box? a. © b. + c. é d.

Since there is no D, your closest answer is C.
The answer is not a, because you can make the sign by putting c in-between parenthesis (c). (Works usually on Google).
The answer is not + either, as it is located on the keyboard.

Hope this helps

the file button then you go to insert tab and click insert hyperlink.