Which of the following factors would not shift the cost curves of an automobile company upward?

Question

Quizplus · Accepted Answer

The development of a new method of installing doors on cars that requires half as many workers as before would reduce the cost of production, thus lowering the cost curves rather than shifting them upward. A regulation requiring improved safety equipment, an increase in raw material prices, and an increase in property tax would all increase the cost of production, shifting the cost curves upward.

Which of the Following Factors Would Not Shift the Cost