The correct options are
B The Brazilian international border exceeds a total length of 9000 miles.
C Brazil shares its land borders with ten countries in South America.
D Brazil is the only country in South America with Portuguese as the national language.
Brazil is the largest country in South America in terms of both by population and by size. Brazil shares borders with nearly all countries of South America except for Chile and Ecuador. Brazil was a Portuguese colony since 1500. It is the only country with Portuguese as its national language. Brazil shares its borders with ten countries. They are Argentina, Bolivia, Columbia, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela. The Brazilian international border exceeds a total length of 9000 miles.