求助语法机经（clear,up to date, and all work well together)

passat123

The laws of the European Union and of its member states each must be clear, up to date, and all work well together.
A. clear, up to date, and all  
B. clear and up to date, and they must all
C. clear, must each be up to date, and  
D. clear, and each must be up to date and
E. clear, be up to date, and have to



纠结DE

wwljcc

个人觉得E

passat123

我个人倾向选D

quickfind

同纠结。。。。。