Caribou live in the tundra and boreal forests found in Alaska, Canada, and Greenland. It is thought that they once ranged as far south as Tennessee. People have hunted caribou for thousands of years. For many Native American tribes, the caribou is an essential part of their diet. Caribou are also hunted for their skins, which can be used to make shelters and clothing. As with other big game, some people also hunt caribou for sport.
The caribou populations of North America are currently threatened or endangered. Two of the seven species have already gone extinct, and their numbers continue to dwindle. The Eastern Canadian herd, which once numbered nine million, now has fewer than 80,000 individuals.
-Excerpted from "Animals in the North" by Klondike van Trapp
Which evidence from the text does not support the inference that caribou populations are threatened by human hunting?
Some big game hunters hunt caribou for sport.
People have hunted caribou for thousands of years.
Caribou is an essential part of the Native American diet.
Caribou live in the tundra and boreal forests of North America.