[m], from the manner of articulation, it is _______.

A．they are horrified to get the bad news
B．they think no medicine is effective
C．they think the pain will disappear as soon as you forget it
D．they are too busy

A．A pain can only be caused by physical harm.
B．Some people are complaining of a pain which does not exist.
C．A pain can be caused by psychogenic factors.
D．Educated people do not complain of nonexistent pain.