The word "good" in "the national good" in the second paragraph probably means__________.

A．Conservation and cooperation.
B．Cooperation and competition
C．The need for jobs.
D．The freedom of the individual.

A．more remarkable than that of a crow
B．less convincing an instance than that displayed by the crow because it seems to be instinctive
C．on a par with that of a crow
D．actually not an instance of what the author is discussing because it is tied to a regular pattern of responses