far more 和 much 都能修饰副词吗

far more 和 much 都能修饰副词吗
在这题中：I'm sure you will do a __than we because you do things __.
A very good job,more carefully B very good work,much more carefully
C much better job,far more carefully D much better work ,much carefully
选哪个，为什么阿。