Read the following context and choose the best option to answer the question.
Context: Although coyotes eat lots of rodents , they also prey on blacktail fawns during springtime . They do have an effect upon the deer population . However , it is debatable whether shooting a single coyote has any impact at all upon the deer population . If one could effectively manage the coyote population , then shooting coyotes might be meaningful .
Question: Why do coyotes choose to also prey on blacktail fawns ?
Options: 
- They are not capable of calculation or discrimination when they hunt . It 's a matter of instinct .
 - They have grown tried of eating only rodents , and are trying to add spice to their diet by moving on to deer
 - None of the above choices .
 - They are systematically trying to eradicate the deer population because they want to have a stronghold on the land


They are not capable of calculation or discrimination when they hunt . It 's a matter of instinct .