Who or not?

[Davy07]

Annie Jump Cannon,____________discovered so many stars that she was called "the censors taker of the sky."
A.a leading astronomer B.Who, as a leading astronomer
C.was a leading astronomer D. a leading astronomer who
A or D that is the question.

[Tilt]

Annie Jump Cannon, a leading astronomer, discovered so many....

Annie Jump Cannon, a leading astronomer who discovered so many....

I think there should be "D"
_________________
We are what we repeatedly do.

[AmYankee]

Hi Davy

In my opinion, the only thing that works is this:

Annie Jump Cannon, a leading astronomer, discovered so many stars that she was called "the census taker of the sky.

That is option A (with an additional comma).
If you choose option D, you are left with an incomplete sentence.

Take care,
Amy
_________________
ESL teacher, translator, native speaker of American English, and author of more than 8000 posts on this site.

[Davy07]

So what does "that she was called "the census taker of the sky" mean? can anyone explain the structure of this sentence?

[AmYankee]

Hi Davy

The word "that" introduces a clause, and the construction is quite similar to the last sample sentence you find here:
http://dictionary.cambridge.org/define.asp?key=82267&dict=CALD
You will often see this basic structure: so+adjective+that-clause.
Look at these::

- It was so foggy that I couldn't see my neighbor's house at all.
- I had so much work to do that I hardly knew where to begin.

All the best,
Amy
_________________
ESL teacher, translator, native speaker of American English, and author of more than 8000 posts on this site.