a guest of honor to the party or at the party

[chance22]

I was asked to fill in the sentence:nThe party, ____ I was the guest of honour, was extremely enjoyable.
A. by which B. for which C. to which D. at which

I'm not sure if "to which" is all right or "at which" should be used here.

Can you tell me which one is proper?
n

[Raymott]

I was asked to fill in the sentence:nThe party, ____ I was the guest of honour, was extremely enjoyable.
A. by which B. for which C. to which D. at which

I'm not sure if "to which" is all right or "at which" should be used here.

Can you tell me which one is proper?
n

"at which". You are a guest at a function, not to one.

[chance22]

Thank you very much!