Could a mixture be made up of only only elements and no compounds

You betcha !  You don't have to go very far to find a mixture like that ...
you're breathing it !

Earth's atmosphere is a mixture of nitrogen, oxygen, argon, and tiny
bits of other gases.  Except for the carbon-dioxide and water vapor,
all the others are elements, not compounds.

The statement that is about an author's persona that is true will be answer A. The author's persona is a created personality distinct from the author.