A i'm pretty sure it sounds the most right but it may be B
Answer:
The combination of this human hunting and climate change at the end of the last ice age is thought to have caused the demise of Camelops here in North America, a fate shared by many other now- extinct Pleistocene mammals.
Explanation:
I hope this helps!! :D
Answer:
Answer 3 as it includes all of the factors that is listed in the rest of the paragraph