DARPA, the agency that has funded a great deal of American AI research, is part of the Department of: A. Defense B. Energy C. Education D. Justice E. None of the above

The correct answer is: A. Defense

DARPA, or the Defense Advanced Research Projects Agency, is a research and development agency of the United States Department of Defense. It is responsible for the development of new technologies for use by the military. DARPA has funded a great deal of American AI research, including the development of the ARPANET, which was the precursor to the Internet.

The other options are incorrect because DARPA is not part of the Department of Energy, the Department of Education, or the Department of Justice.