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

1. astronomers recently identified 23 galaxies so distant from Earth that their light has taken

2. astronomers recently identified 23 galaxies that were so distant from Earth for their light to take

3. astronomers recently identified 23 galaxies to be so distant from Earth such that their light takes

4. 23 galaxies were recently identified by astronomers to be so distant from Earth for their light to take

5. 23 galaxies were recently identified by astronomers as so distant from Earth their light has taken

问题：为什么B不行呢，个人觉得A最后应该用Had taken。

谢谢

so。。。that。。正确

我觉得不用过去完成时，这些星系是过去发现的，但他们发出的光是现在看到的，光发出在过去，经过85 percent of the age of the universe 被我们看到，看到是现在