(3) _______, most modern favelas appeared in the 1970s due to rural exodus, when many people left rural areas of Brazil and moved to cities.18/19 (3) _______, most modern favelas appeared in the 1970s due to rural exodus, when many people left rural areas of Brazil and moved to cities.Although Because Therefore HoweverGiải thíchĐáp án đúng: D However : Tuy nhiên