What have scientists learned a great deal about? What problems is the world facing today?

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问题 What have scientists learned a great deal about?
What problems is the world facing today?

选项 A、How to provide enough food for the ever-increasing population and teach them how to eat food properly
B、How to persuade people of the world to change to healthy diet and not to waste foodd.
C、How to find ways to feed the world population and to make sure that they have the right kinds of food to eat.
D、How to convince governments of all the countries the importance of developing agriculture and providing their people with enough food.

答案C

解析 本题为细节判断题。根据文章第3段所提到的两个问题,即可知本题答案为C。
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