听力原文：W: Mr. Matheson, I'm the business consultant to make some suggestions on developing a functional organizational structure in your company. I've studied all your reports, and your company is making excellent progress,
M: Thank you, Miss Carlyle, I'm in bad need of such suggestions because, to be frank, my company, although small, is rapidly expanding. And please, call me Len. So, what are your recommendations for my new organizational structure？
W: Call me Mary. First, let's start with your operation here. You should set up separate Administrative, Clerical, Back office, and Support functions. There's too much work for your personnel to wear more than one hat any more.
M: Yes, they're already overworked. But that will entail more Managerial functions, won't it？
W: That's right, Lea, and you'll need at least two new managers for separate Marketing and Product Development departments.
M: OK, Mary. What else？
W: I think you'll need an Executive assistant to help you deal with corporate affairs. That should do it for your headquarters here, but since your business is no longer just local, I also suggest setting up a regional office in the south.
M: What about personnel there？
W: You'll need the same basic functionality as here, on a reduced scale. Product Development is only needed at headquarters for now. Your regional head can manage all functions there initially, but will probably need an assistant, also. And that's it!
M: Thanks for your advice, Mary. You do help a lot. Looks like I'll need that assistant right away to help me set all this up!
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A personnel manager.
B. A business consultant.
C. A secretary.
D. An assistant.