单项选择题

What does the passage mainly discuss

A．Inflation.
B．Deflation.
C．How to define inflation and deflation.
D．How inflation and deflation cause changes in income distribution.

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单项选择题What does the word outlay in the last sentence mean

A．Less profit.
B．Money spent for a purpose.
C．More profit
D．No profit.

单项选择题Mr. Smith borrows ＄500 now and pays file money hack next year when prices have doubled, then how much will he be paying back in terms of real purchasing power measured by the money value of this year.

A．＄500.
B．＄250.
C．＄1000.
D．＄750