参考答案

正确答案：B
解析：Why do people in rural areas feel isolated?
推理题。短文中在提到People in rural areas and small towns are becoming increasingly isolated后紧接着说and there is now a strong case for reintroducing new bus services，可见居住在乡村和小城镇的人们之所以感觉被隔离是因为交通的不便，并且根据前文提到的Train services are decreasing and the bus services are also becoming fewer and fewer，and both stop running quite early也可以推测出原因为[B]。