When Europeans came to North America in 1620, the forests were full of bears. There were more than half a million of these wild animals. Then the Europeans began to cut down the forests and hunt the bears. By 1900, there were very few bears left. In recent years, however, the bear population has begun to multiply again. There are now at least 200,000 bears, thanks to better
a. hunting methods.
b. roads and communication.
c. laws to protect them.
d. laws to protect Europeans