Professor: The United States faces several threats, and of those threats, terrorism is by far the most dangerous. Instability across the Middle East breeds extremism. The United States must be proactive in protecting herself and her allies. The professor would most likely agree that: ['Extremism is even more dangerous than terrorism.', 'The United States should invade the Middle East.', 'If the United States becomes aware of an imminent threat to her security, the country should respond militarily.', 'The United States should spread democracy in the Middle East.']