单项选择题

The best title of the passage is ______.

A．Consumer's Purchasing Power
B．Relationship between Income and Purchasing Power
C．Traditional Assumptions
D．Studies in Consumer Behavior
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单项选择题
The example of the mechanic's wife is intended to show that in times of rising prices______.
A．people with declining income tend to buy less
B．people with stable income tend to borrow less
C．people with increasing income tend to buy more
D．people with money 'also tend to buy less
单项选择题
Findings in investigations in Britain are mentioned to show______.
A．factors of time and place should be taken into consideration
B．people in Britain behave in the same way as those in America
C．maintaining stable prices is based on a correct understanding of consumer psychology
D．occasional discounts and sales are necessary
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