Which Group Is NOT represented in modern day Brazil?

* Indigenous People living in the rainforest

* A large Japanese community in Sao Paulo

* A large Russian population in the highlands

*Many people with mixed ancestry

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?