What led to immigration laws based on national origin? A. Increased immigration from eastern Europe
B. More immigrants from Asian countries C. Fewer Catholic and Jewish immigrants D. Immigrants coming to the United States with large families​

A. Increased immigration from eastern Europe

Explanation: IM not 100% sure though

are you referring to matrix mathematics!

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;