To control the spread of diseases on a farm, the farmer needs to?

A. Isolate sick animals
B. vaccinate sick animals
C. introduce sick animals
D. quarantine sick animals

Correct Answer: Option A

A. Isolate sick animals

Explanation

Sick animals are separated to protect healthy animals. This is referred to as isolation and it allows sick animals to rest and recover and prevents the disease from spreading around the pen, group or wider farm.