Which one of the following is not a U.S. supply shock?

A) unions force an increase in national wage rates.
B) the oil supply from the Middle East drops 30%.
C) extended droughts reduce U.S. food production 25%.
D) chinese purchases of U.S. exports increase.

U.S. Supply Shock

An unexpected event that suddenly changes the supply of goods or services in the U.S. economy, potentially affecting prices and leading to economic adjustments.

National Wage Rates

Standardized wage levels set or analyzed across a nation for various occupations or sectors, which can be influenced by government policy or economic conditions.