Which scenario is an example of cost-push inflation?

a. consumers have more money to buy cars, and the prices of cars and car parts rise as a result.
b. an increase in workers’ wages raises the production cost of cars, and car prices rise as a result.
c. the demand for cars falls as consumers have less disposable income, and car prices fall as a result.
d. a government bailout car manufacturers lower their costs, and car prices fall as a result.