单项选择题

A．changed market demand
B．changed OPEC policy
C．security situation in Saudi Arabia
D．U.S. policy toward Saudi Arabia
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1917
单项选择题
A．dropped by 6%B．dropped by 42 dollarsC．rose by 60%D．rose .by 42 dollars
A．dropped by 6%
B．dropped by 42 dollars
C．rose by 60%
D．rose .by 42 dollars
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