I remember seeing a license plate (I think) that had it spelled as LoUiSiAna, where "USA" is capitalized and separated by i's. That's how I remember how to spell it.
San Diego is further south than the northern parts of Alabama, but Mobile is further south than the northern parts of California. Looks like we have a stalemate. Neither should be on this quiz. (I'm joking of course, Djilas's answer is correct.) Northern points have nothing to do with this quiz.
But yes, Puerto Rico doesn't count here...
here it is