Some cows in New Mexico have been getting sick. These cows live in the mountains. Some live as high as 5,000 feet (1,524 meters) up. It can be hard to breathe high in the mountains. Some cows are fine. But other cows get brisket disease. Sometimes, the cows even die. Scientists test them to learn which ones stay healthy. Do It! The scientists are trying to _________ the cows. Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected A milk B return C count D
