找考题网-背景图
单项选择题

A.games are psychologically unhealthyB.any artificially……

From the passage we can infer that ______.


A.games are psychologically unhealthy
B.any artificially-created subspecies would be our enemy
C.the artificial creation of a subspecies unlike us is something that never happens
D.the real or imagined existence of an opposing subspecies is inherent in man's activities