tag questions

[Sitifan]

1. Come and join me, _____?
(A) shall we (B) shan't we (C) will you (D) won't you
The answer is option D. Is option C also acceptable?
2. Have dinner with us, ____?
(A) will you (B) would you (C) won't you (D) haven't you
The answer is option C. Are option A and option B also acceptable?
_________________
Thank you very much for your reply.

[Dozy]

1. C and D both work for me.

2. A, B and C all work for me.

[Sitifan]

Have a cup of coffee, _____?
(Ａ)　will you　(Ｂ)　shall we　(Ｃ)　won’t you　(Ｄ)　all right
The answer is C. Is A acceptable?
_________________
Thank you very much for your reply.

[Dozy]

Yes.

[Sitifan]

Dear Dozy, might I ask if you are a native speaker of English?
_________________
Thank you very much for your reply.

[Dozy]

Yes, I am a native British English speaker.