Answer:
A. steel
B. iron
C. oil
Explanation:
The automobile industry had need of steel in order to create certain parts of the automobile, and steel comes from refining iron (so in a sense, iron is also the answer). Oil is what is used to power many of the cars in the 1900s, and so was one of the largest selling product that continues to grow even today, which allowed for middle-eastern countries to boom.
