试题详情

已知a=[["Rose",560,78,‘A‘],["Jack",600,60,‘B‘],["Tom",560,80,‘A‘],["Mary",550,90,‘B‘]],b=sorted(a,key=lambda x:(x[3],x[1],x[2])),则b[2][0]的值为(         )。

A ‘Rose‘

B ‘Jack‘

C ‘Mary‘

D ‘Tom‘