The Three Diagrams Below Each Show a Supply Curve for Oil

Multiple Choice

The three diagrams below each show a supply curve for oil tankers over a relatively short period of time. FIGURE 13-3
-Refer to Figure 13-3.Consider the supply of oil tankers to an individual Canadian shipping firm,the North American shipping industry,and the world shipping industry.Which diagram best shows the supply of oil tankers that is relevant to the North American shipping industry?

A) diagram 1
B) diagram 2
C) diagram 3
D) diagrams 2 or 3
E) diagrams 1 or 2