D. A decrease in productivity
The one that was a national study of police practice is :
crime stoppers
It's a non profit organization working with the law enforcement
hope this helps
A bird is a mammal and it is warm blooded, gives birth, etc. And a mammal is any type of animal that is warm blooded and has fur. Also, if the babies drink the milk from the mom. (hope this helped! (=^T^=))