单项选择题

According to the writer, real opportunities for businesses are those which _____.

A．require no advertising
B．require few resources
C．match their capabilities
D．exploit new technology
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单项选择题
According to the passage, the age range of some businesses' customers may be limited because of _____.
A．social/cultural factors
B．economic factors
C．legal/political factors
D．factors of state
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