In Mexico, they speak Spanish. But in Brazil, they speak what language?

In Brazil the Language is Portuguese.
You have Portuguese from Portugal And Portuguese from Brazil.
They are similar but you can find some different words and different accent.

Portuguese

Portuguese

Portuguese

Portuguese from brazil, and is not everyone who get spanish. its similar

the official language is Portuguese.
since they are a melting pot, just like Americans, and they are in South America, close to other countries that speak Spanish..most of them speak Span as well..i mean, both languages are Latin-based anyway.
but i would go for B.

mainly portuguese, but they understand spanish.

The majority of Belize's people do have ancestry from Spanish-speaking countries.The Spanish language is used (or was ) to a certain extent in Guam and Mariana island and the Marshall Islands. In Andorra many people use Spanish, also in Western Sahara. Cueta and Mellila are Spanish enclaves inside of Morocco.Spanish is used to some extent in the British colony of Gilbratar

they mainly speak port.