A institutionalizedcommunicative event, as it identifies the uses of language by the social activity that give them visibility, expanding the conception of language beyond morphosyntactic rules, conceiving it as a way of producing meaning.
B rhetorical strategy, as it shows students different formats of texts used in our society.
C text type, as it enables students to recognize the formal characteristics of each type of text.
D all of the three concepts(A, B, and C) as they are important for students to understand genres in their social context.
E none of the three concepts(A, B, or C), as none of them conceives genres as a social activity that constitutes them and are constituted by them.