Question: Write a multi-choice question for the following article, with the given choices and answer: Article: The 48-year-old photographer and adventurer with his trademark black and white beard and shoulder-length hair is also an environmentalist devoted to protecting the source of the Yangtze River.And he likes his new nick-name, "garbage cleaner at the source of the Yangtze River". Yang Xin , is the founder of Green River, one of the country ' s biggest non-govemmental organizationsto protect the country's major rivers. The Yangtze River begins from glaciers in the Tanggula Mountains on the Qinghai-Tibet Plateau. Garbage was rarely seen in the area about 20 years ago, Yang said, as local nomadic people ledtraditional self-sufficient lives, living in tents. Thanks to increasingly convenient transportation, they ' ve started to use modern products packed in plastics, which can ' t degrade naturally. "They don' t have a waste management system and just throw rubbish away like before. So tons of garbage are left on the grasslands and river ways," said Yang. He founded a group with the purpose of dealing with garbage such as plastic bottles, batteries, lunch boxes and so on. In 1997, Yang and his group founded the Sonam Dhargye Nature Preservation Station in the Hoh Xil Nature Reserve, in memory of the anti-hunting hero who sacrificed his life to protect Tibetan antelopes. Options: A .Yang Xin wanted to be well-known as a garbage cleaner B .Green River is one of the non-polluted rivers in China C .The local nomadic people use modern products packed in plastics to lead a simple life. D .Yang and his group help to protect the worsened environment along the Yangtze River Answer: D .Yang and his group help to protect the worsened environment along the Yangtze River Question:
Answer:
We can infer from the passage that _