A:all of which
B:all of them
C:none of whom
D:none of them
小明一连几天用妈妈清洗过咸水鱼的水浇一株花卉,不久后发现该花卉枯萎死亡,其原因可能是( )
①C(s)+ 12 O2(g)═CO(g)放热110.5kJ
②CO(s)+ 12 O2(g)═CO2(g)放热283.0kJ
③C(s)+O2(g)═CO2(g)放热393.5kJ
请回答: