Which of these would result from high inflation in the united states?

The answer to the question is:
Inflationary pressures in the United States can be attributed to three major factors: rising costs of inputs of production (cost-push), increases in aggregate demand (demand-pull) and consumer expectations of future inflation.
The answer is letter C.
Choices to this question are:
A. U.S. goods would be less expensive than before.
B. Americans would demand higher wages.
C. Income levels in the workforce would fall.
D. The Consumer Price Index would be a negative number.