The correct answer is:
[A]: "
" .
_________________________________________________________Step-by-step explanation:_________________________________________________________We are asked to simplify:
→
_________________________________________________________Note the following property of exponents:
_________________________________________________________
=

;
{ b
0 } .
_________________________________________________________As such:
→ 
;
=
=
=
.
_____________________________________________________________
The answer is: "
" ;
→
which is: "
Answer choice: [A]: "
" .
_____________________________________________________________
Hope this answer—and explanation—is of some help to you.
Please comment below or otherwise respond to me if you have any questions or if I can be of further assistance.
Best wishes!