A Factory Worker Earned $10 an Hour in 1980

Multiple Choice

A factory worker earned $10 an hour in 1980. The CPI was 0.82 in 1980. The same factory worker was earning $15 an hour in 1990 when the CPI was 1.31. From 1980 to 1990, the factory worker's hourly real wage:

A) increased from $7.63 to $18.29.
B) decreased from $12.20 to $11.45.
C) remained constant.
D) increased from $10 to $15.