A species of mouse occupies the same niche in a forest that a species of rat occupies in a nearby forest. What would be the most likely result it members of the rat population were introduced to the mice's forest?

A. The rats would kill the mice

B. The rats would adopt a new diet

C. Either the mice or the rats would die off or move away

D. Either the mice or the rats would evolve into a new species

The correct option is;

A. The rats would kill the mice

Explanation:

The mouse that exist in the forest niche will continue inhabiting the niche because the introduced rats are cautious mammals

Whereby the population of rats increases and there is competition for food there is a likelihood that rats could kill the mice. However in plentiful supply of food, the two rodents could coexist

Given the nature of the niche which is shared and the differences in behavior of the rats such as muricide, the rats will kill and eat the mice as noticed  in scientific studies over the past several decades.