"Feel out of sorts", as it is used in the second paragraph could best be replaced by _________.

A．A procedure is explained and its significance is emphasized.
B．A problem is examined and solutions are given.
C．Two contrasting views of a problem are presented.
D．Recent pharmacological advancements are outlined in order of importance.

A．the best way to overcome a bad mood is to talk to oneself
B．when one is in a bad mood, he or she may not work very efficiently
C．some drugs are more effective than physical exercises
D．a person can make a big profit if he is in a good mood