A、$14 billion. B、$40 billion. C、$2.5 billion. D、$25 billion. C新闻中指出，世界银行估计在今后的40年时间里，协助发展中国家的农业适应气候变化，每年得花费25个亿。而有些人认为每年的费用将高达14

A UN agency says there are major funding gaps in efforts to help the agricultural sector adapt to climate change. The Food and Agriculture Organization, the FAO, says this could affect food security. The warning comes as the UN Climate Change Conference continues in Cancun, Mexico.
    The World Bank estimates it will cost about $2.5 billion a year—for the next 40 years—to help agriculture in developing countries adapt to climate change. Other estimates say costs could run as high as $14 billion a year.
    However, the FAO says, "Available financing mechanisms are substantially insufficient to meet the climate change and food security challenges faced by the agricultural sector." This, despite the fact that the FAO says there are many examples of how agriculture can become more.
3. According to the world bank, how much does it cost to tackle agricultural challenges yearly?
4. According to FAO, what is the problem faced by the agricultural sector?