The correct answer is:
[A]: "
" .
_________________________________________________________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.
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The answer is the third option, it will run out in 8 days.
Correct Answer to this question is 4