The lightbulb is probably one of the most important inventions in science. It has changed the world by letting people do their w
ork at night. Before the lightbulb, people had to use candles or fires to see at night. These light sources did not give off enough light. In some places, like coal mines, using candles could be dangerous. The lightbulb provided a cleaner and safer light source. The lightbulb allows people to drive their cars at night. Lighthouses also use lightbulbs to guide ships safely to shore. The lightbulb is used in sports, television, and many other businesses.
Which of these best summarizes the selection?
A.
The lightbulb helps people in many different ways. It allows people to work or drive at night, helps keep people safe, and is used in many businesses.
B.
Lighthouses use lightbulbs to help guide ships that are at sea. The lightbulb is also important because it lets people drive their cars at night.
C.
The lightbulb was safer to use than candles inside the coal mines. The lightbulb is also used in sports, television, and many other businesses.
D.
Before the lightbulb was invented, people had to read and write by candles and fires. These light sources were not very bright, and they could be dangerous.
