题目内容：
根据以下内容，回答题。313 Northen Boulevard
Springfield, Massachusetts 01103
August 2nd,2006
Ms. Sara Valenti
Financial Officer
DZK Investments Unlimited
23436th Avenue
New York, New York 10023
Dear Ms.Valenti,
I want to start by saying that the loans your firm has made over the past two years have been very helpful to my business. Recently, however, I was looking over some earlier correspondence regarding the modification of our contract. I noticed that quarterly payments on the latest loan are due to begin this October. I understand that we agreed upon this date. However, in order to fully finance the expansion of my business, I have also taken out loans with several banks. Paying back those loans has left me temporarily short of cash. I am requesting that you delay the start of my payments until January 1st.
I understand that this may be against your company's protocol, but please take into consider-ation my punctuality on all past payments. I would appreciate your input on this matter as soon as possible.
Sincerely,
Ryan Black
Springfield Hardware
Who probably wrote this letter? A．A landlord
B．A business owner
C．A bank officer
D．An accountant
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答案解析：