4. The concept of encouraging learners to master two languages, we call bilingualism. If learners obtain more than two languagesat school or by direct experiences without attending the language classes offered in a particular school or educational system,emphasizing an individual person’s experience of language in its cultural contexts and building up a communicativecompetence in which languages interrelate and interact, the concept is called ________.
(A) Multilingualism
(B) Lingua franca
(C) Plurilingualism
(D) Immersionism