How is Paraguay different from Chile, Argentina and Uruguay?

Most of its descendants are mestizos.
Most descend from Italian immigrants.
Spanish is the main language.
English is the main language

in Chile, Argentina, and Uruguay.

It has a smaller population compared to the other three countries.
It has a different geographic location, being landlocked in South America.
It has a lower GDP per capita compared to Chile, Argentina, and Uruguay.
It has a different political history, with a longer period of dictatorship in the 20th century.
It has a unique cultural heritage, with influences from indigenous Guarani culture.

Is it A, B,C, or D?

It is D) English is the main language.