According to the text, which of the following developments have taken place in the American steel industry during the past 40 years?
A)The percentage of steel produced in vertically integrated steel plants has increased.
B)The percentage of steel produced in vertically integrated steel plants has decreased.
C)More steel makers have integrated vertically into coal mining.
D)More steel makers have integrated vertically into iron ore mining.

Question

Quizplus · Accepted Answer

The text states that "the proportion of steel that comes from [vertically integrated plants] has declined dramatically over the past 40 years." This indicates that the percentage of steel produced in vertically integrated steel plants has decreased. The text does not provide information about coal mining or iron ore mining integration.

According to the Text, Which of the Following Developments Have