Which of the Following Statements About El Salvador's "La Matanza

Which of the following statements about El Salvador's "La Matanza" is FALSE?

A) Despite the massacre, the local indigenous population mostly maintained their language and customs.
B) The organizer of the uprising was a mestizo from the city, not an indigenous resident of the countryside where the uprising took place.
C) La Matanza took place in El Salvador's most indigenous and most impoverished region.
D) The Communist movement in El Salvador was suppressed for decades after the massacre.