20. How does the USDA define a concentrated animal feeding operation (CAFO)? A. A CAFO is defined as an AFO with over 1,000 animal units kept for over 45 days a year

B. A CAFO is defined as an AFO with over 1,000 animal units kept for the majority of a year.

C. A CAFO is defined as an AFO with over 1,000 animals of any size kept for over 45 days a year.

D. A CAFO is defined as an AFO with over 1,000 animals of any size kept for the majority of a year