单项选择题

What is a possible negative effect of olestra according to some critics

A．It may impair the digestive system.
B．It may affect the overall fat intake
C．It may increase the risk of cancer.
D．It may spoil the consumer's appetite.

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单项选择题

In the eyes of the author, conventional opinion on conflict is______.

A．wrong
B．oversimplified
C．misleading
D．unclear

单项选择题

People working in a not-for-profit organization

A．seem to be difficult to satisfy
B．are free to express diverse opinions
C．are less effective in making decisions
D．find it easier to reach agreement