单项选择题

According to the passage, which of the following is NOT a factor in the complete understanding of price（）

A．Instructions that come with a product.
B．The quantity of a product.
C．The quality of a product.
D．Guarantees that cover a product.

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单项选择题

What is the best title for the passage（）

A．The Inherent Weaknesses of the Price System.
B．The Complexities of the Price System.
C．Credit Terms in Transactions.
D．Resource Allocation and the Public Sector.

单项选择题

According to the passage, the price system is related primarily to （）

A．labor and education
B．transportation and insurance
C．utilities and repairs
D．products and services