Per the 2010 Census, of the 100 most populated cities in the United States, exactly TEN of them have names that begin with the letter C. Three of them are located in the same state; three others have two-word names; and two others are located in East Coast states. (Sorry, those are all the hints you'll get from me.)
You'll have five minutes to take the quiz, and the clock starts when you key in your first entry. (State names are not required; just the city.) Good luck!