单项选择题

A、2RNH2+H2S→(RNH32S、(RNH32+H2S→2RNH3HS
B、2R3N+H2S→(R3NH)2S、(R3NH)2S+H2S→2R3NHHS
C、2R2NH+H2S→(R2NH)2S、(R2NH)2S+H2S→2R2NHHS
D、2R3N+H2O+CO2→(R2NH22CO3、(R2NH22CO3+H2O+CO2→2R2NH2HCO3