Some of the questions were not questions but indoctrination, e.g., "capitalism is best because ..."
The quiz is from a right-wing site and some of those civics questions weren't civics at all, e.g., what a business profit is. Of course, right-wingers love to weave capitalism into the very fabric of society as if it goes hand in hand with democratic governance, but it most certainly does not.
I also strongly doubt the website's claim (repeatedly emphasized) that government officeholders have scored lower than the general public. This is clearly meant to imply that democratic government is bad, which is ironic for a site purporting to promote civics in a democratic country.