31. What is the man having trouble with? A. Conducting a test B. Preparing a bill C. Contacting a patient D. Shipping an order

Question 31 - 33 refer to following conversation:

M-Cn: Mary? I'm working on the bill for one of Dr. Singh's patients, and I keep getting an error message for the code I'm using...

W-Am: Oh! The billing codes recently changed. You must be referring to the old list.

M-Cn: Do you have the updated one?

W-Am: Yes, right here. Which procedure is it?

M-Cn: A blood test

W-Am: All right ... Here's the code you should use.

M-Cn: Thanks! Could I get a copy of that list?

W-Am: Sure. But Jheard they'll be adding the codes to our billing software soon, so we won't need to deal with paper lists anymore.

31. What is the man having trouble with?