Answer:
Option D, three
Explanation:
Fresh water shares a very small percentage of total water available on planet earth. The 70% of earth’s surface is covered by water. Out of this 70% only 2.5 % is the fresh water rest all is saline water existing in oceans and seas. Even out of the this 2.5% of freshwater, human being has yet been able to utilize only 1% of the fresh water reserve.
Since 2.5% is near to the numerical figure of 3% , option D can be considered as correct answer
