According to the passage, which of the following best describes those who work in large cities and live in small villages

A．housing conditions
B．lack of communication
C．a sense of isolation
D．a serious generation gap

A．the parents may become violent and difficult to put up with
B．the residents may not have a good view from their windows
C．the residents may become indifferent to their neighbors
D．the children may become too frustrated to be controlled