American is a name for the ethnic group of white Americans who don't identify with their specific roots. But the source says White not American, so this quiz is inaccurate but so is the source because their "White" demographic is not an ethnicity its just an assortment of peoples that are considered white enough. The most common ethnic group in the US is German with American coming in like 4th if you look at a better source.
Jordanian is a mixed type of Arab people, they aren't just Arab they are also descended from Nabataeans and Ammonites and other groups that previously inhabited Jordan. This is from the source blame the US government.
Really bad made quiz, cannot distinguish between ethnicity and nationality, the quizzer doesn't know anything about ethnicity whatsoever and even putting the language instead of the ethnicity (like turkish instead of turks)
Jordanian is a mixed type of Arab people, they aren't just Arab they are also descended from Nabataeans and Ammonites and other groups that previously inhabited Jordan. This is from the source blame the US government.