Answer:
The value of n must be a positive number.
Step-by-step explanation:
Area of a square is given by [tex]$a^2$[/tex] where [tex]$a$[/tex] is the side of the square.
Now, given the area of the square is [tex]$4n$[/tex].
OA) If the area had been zero, i.e., [tex]$n = 0$[/tex] then it means that there is no square at all.
OB) Also, it can not be any other number other than zero as this can include negative numbers as well. And an area being negative makes no sense. (OD) is eliminated as well.
So, the area should be positive.