单选题 A shift in the long-run Phillips curve represents a change in the:

A、

A. actual inflation rate.
B、

B. expected inflation rate.
C、

C. natural rate of unemployment.

【正确答案】 C

【答案解析】The long-run Phillips curve represents the natural rate of unemployment. Changes in the natural rate can occur due to long-run changes in the state of technology and the size, makeup, and mobility of the labor force.