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

decreased. In the late 1800s, electric lights were introduced in many cities.

Which statement correctly describes the change from whale oil lamps to electric lights.

a

b

Analyzing the costs and benefits proved electric lights to be the better choice.

The benefit of using whale oil lights outweighs the benefit of using electric

lights..

Whale populations decreasing was a large benefit.

Analyzing the costs and benefits proved whale oil to be the better choice.

с

d