单选题 "This park has more than 200 waterfalls that are 15 feet or higher. And 150 of them have never been mapped or photographed," says park historian Lee Whittlesey. "Now that's a ______ to the size of Yellowstone. "
A. proposition B. hypothesis C. ceremony D. testimony

【正确答案】 A

【答案解析】[解析] proposition建议，主张；hypothesis假设；ceremony仪式；testimony证词，供诉。题目说还有150处瀑布没有被绘制或拍摄，现已向公园提出了这一建议，所以选A。