171 km³ per year.
0.006% = 0.006/ 100 = 0.00006 ;
0.00006 * 2,850,000 km³ = 171 km³ per year.
In Florida they are protected and can't be hunted.
It covers a more understandable distance that can be determined by a more reasonable unit of measure.
The answer is most likely A)