Neither of or None of?

[hoangkha]

Hi, teachers!
________ the girls has turned in the papers to the constructor yet.

A. Neither of

B. Both of

C.None of

D. All of

The key is A but I am wondering why C isn't chosen, please?

[emsr2d2]

Hi, teachers!
________ the girls has turned in the papers to the constructor yet.

A. Neither of

B. Both of

C.None of

D. All of

The key is A but I am wondering why C isn't chosen, please?

In order to know whether to use "Neither" or "None", we would have to know how many girls were involved in the first place. I have no idea why anyone would turn in papers to a "constructor".