I think 19 but slave states were 15
I’m not sure hopefully it’s correct
A2A — They are also known as “meridians.” Zero degrees longitude is called the Prime Meridian, as it is the line from which other meridians are calculated. Bonus answer: Another name for lines of latitude is “parallels,” so called because lines of latitude run parallel to each other (lines of longitude do not.)
We need the answer choice
A. The desert was difficult for invaders to cross.
