Question

Which of the above diagrams illustrates the effect of an increase in automobile worker wages on the market for automobiles?

Answer 1

Considering the diagrams (file:///C:/Users/Administrator/Desktop/image...1.webp).
The answer is D only.
The diagram shows a shift in the supply curve. Changes in production cost and related factors can cause an entire supply curve to shift right or left. This in turn causes a higher or lower quantity to be supplied at a given price. Additionally, if the cost of resources used to produce  a good increases, sellers  or suppliers will be less inclined to supply the same quantity at a given price, and the supply curve will shift to the left. Those factors that increase production efficiency such as technology advances, shifts the  supply curve to the right.