B. The explorer who claimed Brazil was able to do so because Brazil lay east of the Line of Demarcation drawn at the Treaty of Tordesilla.
C. A map of South America that shows the 1494 Line of Demarcation explains why the people of Brazil speak a different language from most of the people living in the rest of South America.
The answers are B and C. I had it on a test and those were the answers :)
I believe the answer you are looking for is:
"In the old days of assimilation, foreigners felt the required need to become as American as possible. America is no longer asking or demanding immigrants to abandon their birth culture."
Hope this helps!!
(Brainliest)