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You will find the information you need here. :3 Good luck!
(Says I have to cite my sources so here goes: I just copy/pasted your question into Google lol)
Answer:
I believe because some prats of south amsica where conceyed by different people Spain and proutugul and because of the different tribes of native poeple
Explanation:
1:50 000 because 1/100 is only one of a hundred 1:50 is one and a half of one hundred
A or b or c not d you chose
