In paragraph 1, the mechanization of industrial...

Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Given the American manufacturing tradition, it was also inevitable that cars would be produced in larger volume at lower prices than in Europe. The absence of tariff barriers between the states encouraged sales over a wide geographic area. Cheap raw materials and a chronic shortage of skilled labor early encouraged the mechanization of industrial processes in the United States.
This in turn required the standardization of products and resulted in the volume production of such commodities as firearms, sewing machines, bicycles, and many other items. In 1913, the United States produced some 485,000 of the world total of 606,124 motor vehicles.
The Ford Motor Company greatly outpaced its competitors in reconciling state-of-the-art design with moderate price. Cycle and Automobile Trade Journal called the four-cylinder, fifteen-horsepower, 825. Its two-speed planetary transmission made it easy to drive, and features such as its detachable cylinder head made it easy to repair. Its high chassis was designed to clear the bumps in rural roads. Vanadium steel made the Model T a lighter and tougher car, and new methods of casting parts (especially block casting of the engine) helped keep the price down. Committed to large-volume production of the Model T, Ford innovated modern mass production techniques at his new Highland Park, Michigan, plant, which opened in 1910 (although he did not introduce the moving assembly line until 1913-1914). The Model T runabout sold for 290 for the coupe, 15 million units had been sold, and mass personal "automobility" had become a reality.
In paragraph 1, the mechanization of industrial processes in the United States was the result of ______________
A. the shortage of skilled labour
B. a wide geographic area
C. American manufacturing tradition
D. larger volume of production