It can be inferred from the text that_________

Câu hỏi: Read the following passage carefully
Our demand for water is constantly increasing. Every year there are more and more people in the world.
Factories turn out more and more products and need more and more water. We live in a world of water. But almost all of it – about 97%-is in the oceans. This water is too salty to be used for drinking, farming, and manufacturing. Only about 3% of the world’s water is fresh. Most of this water is not easily available to man because it is locked in glaciers and icecaps. There is as much water on earth today as there ever was or will ever be. Most of the water we use finds its way to the oceans. There, it is evaporated by the sun. It then falls back to the earth as rain.
Water is used and reused over again. It is never used up. Although the world as a whole has plenty of fresh water, some regions have a water shortage. Rain does not fall evenly over the earth. Some regions are always too dry, and others too wet. A region that usually gets enough rain may suddenly have a serious dry spell and another region may be flooded with too much rain.
Choose an option (A, B, C or D) that best answers each question.
It can be inferred from the text that_________
A. no region in the world suffers from a lack of fresh water.
B. rain does not fall equally everywhere on earth.
C. the world has plenty of fresh water in comparison with salty water.
D. a region that usually gets enough rain hardly ever has a dry spell.