It's because in the middle colonies more immigrants from other countries went in to that specific area, because it was much more busy than other colonies....and a higher chance of good job capabilities
Answer: D. Know-Nothing and Free-Soil
B I believe sorry if it’s wrong
The meter was redefined by international agreement in 1983 as “the length of the path traveled by light in a vacuum in 1/299,792,458 of a second”
I’m pretty sure the answer is C because that’s what I had