GWD-TN17 Q36 应该没讨论过

期期啦啦

Using a criterion based on an object’scolor, astronomers recently identified 23 galaxiesso distant from Earth that their light has taken 85 percent ofthe age of the universe to reach us.

     
A.     astronomers recently identified 23 galaxiesso distant from Earth that their light has taken

B.      astronomers recently identified 23 galaxiesthat were so distant from Earth for their light to take

C.      astronomers recently identified 23 galaxiesto be so distant from Earth such that their light takes

D.     23 galaxies were recently identified byastronomers to be so distant from Earth for their light to take

    E.     23 galaxies were recentlyidentified by astronomers as so distant from Earth their light has taken

答案是A，虽然我也觉得A比较好，但是还是情不自禁选了B- -。。总觉得B里so...for..to do有点怪，可是怪在哪里又打不上来


还有一个很重要的问题：就是选项里their是在的问题，their指代的应该是galaxies，但是句子主语不是astronomers吗？不应该优先指代主语吗？是不是代词是按意思来的？


求指教，谢谢！

christete

A的时态是怎么回事啊。