technician a says that the two - way catalytic convertor was the first type of catalytic convertor designed…

technician a says that the two - way catalytic convertor was the first type of catalytic convertor designed. technician b says that it converts hydrocarbons and carbon monoxide to carbon dioxide and water. who is correct?\n\na. technician a\nb. technician b\nc. both technician a and technician b\nd. neither technician a nor technician b