Both can be used to make valid sentences. But since this is the causative form of the verb 'make', become/be/get are already present in the concept and can/should be dropped because they do not convey any additional information. She can make herself be understood. == She can make herself understood. Watching happy movies makes me be happy. == Watching happy movies makes me happy. The vacation made me become lazy. == The vacation made me lazy. Ironically, the medicine made me get sicker. == Ironically, the medicine made me sicker. etc.. So.. use the A form..