Answer:
A. 9,006
Explanation:
First we need to find 25% of 4,000
4,000/4 = 1000
So we know there are 1,000 mosquitoes a month.
So In 4 months it would be 4,000 more mosquitoes.
That would be 8,000 but i don't see that so I would say A.
Let me know if I'm correct.