Does this question have different options?

[cnjackie88]

— David promised to come round to have supper with us today.  
— But he ____. I’ve been alone for half an hour.  
A. won’t 
B. hadn’t 
C. hasn’t   
D. doesn’t 

[Charlie Bernstein]

Hi, Cnjackie!

When is the assignment due?

[cnjackie88]

Come on! I'm not a student. It's also not a assignment. I have the answer. But I'm just wonering which one you will choose, and why choose it.
I also have asked someone else, but they also have different opinions.

[emsr2d2]

Which answer did you choose before you found out the "right" answer, and what was the given answer?

[cnjackie88]

I think both A and C are right. The standard answer is A.

[emsr2d2]

It's not a particularly well-written question but with "I've been alone for half an hour" means that C is the only logical answer. We are supposed to assume (I think) that David should have arrived at some point before or during the last half an hour. Therefore, "But he hasn't [come for supper]" is the only one that works.

"But he won't" would be OK without "I've been alone for half an hour" because there is no correlation between the two.

So in my opinion, the "official" answer is wrong.

Where did you find the question (source and author)?

[cnjackie88]

It's from a junior high school English test in China.
Some people say A is right, and some say C is right.

[cnjackie88]

I think the replying part should depend on the time. Supposing they have finished supper, and ready to go. They think David will not come.

[Tdol]

I think both A and C are right.

They are.

[emsr2d2]

I still don't see how "But he won't. I've been alone for half an hour" makes sense. And if the two people having the dialogue have already finished supper and are getting ready for bed, then the person saying "I've been alone for half an hour" is lying.