What is the role of paragraph 2 in the passage as a whole? A. It explains how by increasing the supply of raw materials from other countries, British industries were able to reduce costs and increase production. B. It explains how the production of mechanical energy and its benefits spread quickly across countries that were linked commercially with Great Britain. C. It demonstrates why developments in a single industry could not have caused the Industrial Revolution. D. It illustrates why historians have assigned great importance to the issue of energy in the rise of the Industrial Revolution.