His salary as a bus driver is much higher ( ).

His salary as a bus driver is much higher ( ).
A、in comparison with a teacher
B、than a teacher
C、than that of a teacher
D、to compare as a teacher
【正确答案】：C
【题目解析】：more than that 代之salary，句子含义是作为公车司机，他的工资比老师的工资要高。