How did covet 19 come to America

What I heard was that people in the science laboratory in china "accidently" let loose a virus that they were studying, which also led to that person in contact with it to go out and spread it without knowing. Causing the virus to spread across all the world within a few months.  

That is my explanation! \_(ツ)_/

these conditions long with a short growing season made farming difficult.

explanation:

the north has a climate of warm summers and snowy cold winters. the terrain is rocky, hilly, and not good for farming.

answer; i believe the correct answer is ( quakers);