A、Getting help from others. B、Always trying new methods. C、Depending on modern machines. D、Trusting their own ideas. D事实细节题 文中提到

All big cities are quite similar. Living in a modem Asian city is not very different from living in an American city. The same cannot be said about living on farms, however.
    In many parts of the world, farmers and their families live in villages or towns. In the United States, however, each farm family lives on its own fields, often beyond the sight of any neighbors. Instead of traveling from a village to the fields every morning, American farmers stay on their land throughout the week.
    For many years, however, farming in America was often a lonely way of living. Farmers had to deal with their own problems, instead of getting help from others. They learned to try new methods, and to trust their own ideas instead of following old ways.
    Of course life keeps changing for everyone, including farmers. Today there are cars, good roads, radios and television sets. And of course there are modem machines for farming. All of these have changed farm life.