Answer: Option 'A' is correct.
Explanation:
Since we have given that volume of a pool.
As we know that volume is the measure of three dimensional shapes.
So, it always takes cubic measure.
So, there are two possibilities :
1) cubic inches
2) cubic feet
But we know that 1 feet = 12 inches
Thus, it means inche is smaller unit than feet.
but pool must be larger in feet.
So, Option 'A' is correct.