Look at the note below. You will hear a conversation about a letter. The Bradford Films sent the letter in【C9】______to the phone

A: Did you see the letter I got from Bradford Films? They sent it in response to your phone call last week.
B: If they wanted to say something about my call last week, why didn’t they send it to me?
A: I guess they must not have your contact information , so they sent it addressed in care of your department head. Anyhow, they wrote to confirm in writing what you had discussed about the Milton contract.
B: Can I see it for a second?
A: Sure, here it is...
B: "Dear Mr. Clark, further to our telephone call last Friday, I am writing to confirm our meeting on July 21. As we discussed, our meeting is to review the contract details. "
A: Did they ask you to send the files beforehand?
B: Let’s see, "we would be grateful if you could please send related materials to our office prior to our meeting. " It looks like it... hey, was there anything else sent along with this letter?
A: I don’t think so, why do you ask?
B: The letter reads, "Please find enclosed a copy of our agenda for you to review. " I don’t see anything else in the envelope...
A: Maybe they forgot to attach it to the letter. You should give them another call.