John D. Rockefeller’s business in the 1860s was transporting petroleum products. Why did John D. Rockefeller create a barrel-making factory at the same time? A. He did not want to continue paying another company for barrels. B. He foresaw that oil might not remain a stable investment. C. He realized transporting oil in barrels would be faster than using pipelines. D. He wanted to set the price other oil companies had to pay for barrels.