The answer is letter c, specialization increase the demand for product. It is because specialization focuses more on the products that are being produced in which they provide greater quality for the consumers in which promotes its product efficiency.
World War 2 started in 1939, when Nazi Germany invaded Poland
The correct answer is D.<span>gathering at Woodstock</span>
The increase of technology used during the construction of the railroads and factories is considered the second Industrial Revolution. This is because of the many inventions and help of transportation use. Hope this helps.