The correct answer is C, QUITE FORMAL.
To write a letter to the movie theatre, you should use the “quite formal”-type of formality, the writer is expected to express with unusual and widely developed vocabulary, the writer should avoid using contractions or abbreviations, should use tenses and grammar like passive voice, compound and complex sentences, noun phrases, indirect questions, use proper punctuation and correct sentence structure.
The types of formality are three: Formal, Semi-formal or neutral and Informal. These are some examples of each one.
Formal: Academic articles. Essays, contracts, and many other options.
Semi-formal: daily conversations with colleagues, letters, and interviews.
Informal: Daily conversation with friends.
