单项选择题

A "Zero-sum game" is one in which______.

A．no parties can win
B．nobody plays his role seriously
C．one side gains in proportion to what the other side loses
D．the result will mean nothing to both sides

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单项选择题

Which of the following sentence is true according to the passage

A．Americans can easily get weapon from the National Rifle Association.
B．The National Rifle Association had successfully prevented the government from banning civilian's access to deadly weapons.
C．Observers abroad are astonished to a great degree that Americans have access to deadly weapons.
D．The author expresses his thanks to the National Rifle Association.