According to the writer, it is ______ to keep up with the Joneses.

A．all the Americans like to keep cats
B．the cat is called Buddha because he is always quiet
C．the population of a small university is only one third of that of the largest one
D．it is easier for a graduate from a large university with a famous department to do job hunting.

A．Jim is the second child in his family.
B．Jim has a younger sister.
C．Jim is the third child in his family.
D．Jim is the only child in his family.