Compared with the number of American people who had their blood cholesterol levels checked in 1990 was ____________________ than that of in 1983.

A．The man can come another time.
B．There would be more fun without the man’s roommate.
C．It is no problem if the man’s roommate refuses to come.
D．The man can bring the roommate along and enjoy the party.

A．The root of Jim’s health problems.
B．The woman’s problems with her workaholic professor.
C．Jim’s relationship with his professor.
D．Problems that Jim and the woman have with their workloads.