In the first paragraph of the passage, the author's attitude toward the literary critics mentioned can best be described as______.

A．Consumer's Purchasing Power
B．Relationship between Income and Purchasing Power
C．Traditional Assumptions
D．Studies in Consumer Behavior

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