Answer:
A. Hunting and killing the snakes on the farm
Step-by-step explanation:
Snakes are naturally born predators and rodents such as rats and mice serve as their preys. Hence, their presence on the farm will limit the population of rodents in such farm.
Therefore, hunting and killing all the snakes on the farm will allow rodent population to flourish, leading to a spike in their population.
The correct option is A.