Whale blubber was once used by many countries to make lamp oil and other products. Because of the usefulness of whale blubber, huge numbers of whales were caught and killed in the 1800s. As a result, the whale populations around the world severely dropped. In the late 1800s, electric lights were introduced in many cities. How do you think the use of electric lights affected whale populations?
A.
Most whale populations began to rise.
B.
Most whale populations became extinct.
C.
Most whale populations moved to other areas.
D.
Most whale populations continued to decline.