Answer:
I'm pretty sure the answer is d) all of the above.
Step-by-step explanation:
This is because extinction is caused by not only pollution and disease, such as plagues and viruses, but also because of weather changes (such as tropical plants not being able to survive during an ice age) and because of destruction of habitat (like deforestation). This leads me to believe that all of the above are correct, which in other words is answer d.
Hope this helps!!