You are the Volunteer Program Coordinator for your county's farm agency. You have a need for volunteer veterinarians that specialize in large animal medicine that you can call on to help with livestock in an emergency. Of the choices below, which is the most likely to have the greatest success at recruiting veterinarians with the experience you need?

A. Farmers who use the veterinarians' services
B. A national veterinarian journal
C. The local veterinarians' network
D. Public bulletin boards in large stores