A．were the same as the traditional assumptions about saving and spending patterns
B．were in agreement with those of the investigations made at the same time in America
C．proved the traditional assumptions about earning and spending are totally wrong
D．were much better than those of the investigations made at the same time in America

A．consumers will spend their money quickly if they expect prices to increase
B．the pricing policy should be based on a correct understanding of consumer psychology
C．remaining stable prices is a correct business policy
D．price increase always stimulate people to hasten to buy things