Respuesta :
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 correct answer is é.
All other choices are already accessible from the keyboard or with by using (c) in word it would automatically turn into this ®