According to the passage, most patients are satisfied with treatment when _____.

A．The doctors are likely to provide the patients with their requirements.
B．Now people doubt everything in the world.
C．Patients tend to accept medicine because it makes no demands on the takers rather than putting up for a moment with a disgusting taste.
D．Henry Taylor probably took the medicine his friend brought him.

A．the social sciences are primarily concerned with the behavior of material things whereas the natural sciences mainly deal with the behavior of men
B．the natural scientist does not care how his subject matter behaves while the social scientist is interested in the behavior of his subject matter
C．the social sciences deal with the behavior of men whereas the natural sciences deal with the behavior of material things
D．men are always subjective and emotional whereas the nature is objective and unemotional