The correct answer is C. Confrence. The correct spelling is conference.
A conference is a meeting of people for a particular purpose, especially a meeting of representatives of different groups or organizations.
The word "confrence" is not a real word. It is a misspelling of the word "conference". The word "conference" is spelled with an "e" after the "n".
The word "confrence" may be a typo, or it may be a word that is used in a particular dialect or slang. However, it is not a standard English word.
