B: Um manual do aluno publicado em inglês e espanhol.
Explanation:
The word "diffuse" means "to propagate", "to spread" and to "divulge" something. Thus, a cultural linguistic diffusion, aims to propagate the culture and language of someone somewhere. Because of this concept, we can conclude that an example of cultural linguistic diffusion in the United States is a student manual published in English and Spanish. Through this manual, the Spanish language would be diffused within the school environment, in addition, a language shows a lot about the culture of a people and can even influence students to want to know more about the language and culture of the countries that speak it.
