One of the questions in this quiz has a wrong answer. I can't tell you which question number it is, because the randomizer (which I can't turn off) scrambles the order of the questions for each student. It's a question is:
The rise of the automobile:
The actual correct answer is D all of the above, but it is being marked wrong. Unfortunately, I can't change the settings at this point, so I'll raise everyone's score 4 points.
Hat-tip to Verenice for finding this and pointing it out /:-)