However, like any new product entering the food chain, GM foods must be subjected to careful testing. In wealthy countries, the debate about biotech is not so fierce by the fact that they have a large number of foods to choose from, and a supply that goes beyond the needs. In developing countries desperate to feed fast-growing and under fed populations, the matter is simpler and much more urgent: do the benefits of biotech outweigh the risks?

　　The statistics on population growth and hunger are disturbing. Last year the world’s population reached 6 billion. The UN states that nearly 800 million people around the world are unhealthy. About 400 million women of childbearing age don’t have enough iron, which means their babies are exposed to various birth defeats. As many as 100 million children suffer from vitamin A deficiency, a leading cause of blindness.

　　How can biotech help? Genetic engineering is widely used to produce plants and animals with better nutritional values. Biotechnologists have developed genetically modified rice and they are working on other kinds of nutritionally improved crops. Biotech can also improve farming productivity in places where food shortage are caused by crop damage attributable to drought, poor soil and crop viruses.

　　38. The passage mainly talks about _______.

　　A. the world’s food problem

　　B. the development in biotech

　　C. the genetically modified foods

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