In paragraph 3, the author mentions William Murdoch's invention of a new form of nighttime illumination in order to A. indicate one of the important developments made possible by the introduction of Watt's steam engine B. make the point that Watt's steam engine was not the only invention of importance to the Industrial Revolution C. illustrate how important coal was as a raw material for the Industrial Revolution D. provide an example of another eighteenth-century invention that used steam as a power source