阅读下面的短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。
A
Thomas Alva Edison was awarded more patents(专利)on inventions than another American. When he died in 1931, Americans wondered how they could best show their respect for him. One suggestion was that the nation observe a minute or two of total blackout. All electric power could be shut off in homes, streets, and factories.
Perhaps this suggested plan made Americans realize fully what Edison and his invention meant to them. Electric power was too important to the country. Shutting it off for even a short time would have led to complete confusion. A blackout was out of the question.
On the day of Edison's funeral, many people silently dimmed their lights. In this way they honored the man who had done more than anyone else to put the great force of electricity at his country people's fingertips.
People decided to honor Edison when________.

A．he made the first electric light

B．electric power was 100 years old

C．the country realized electricity's importance

D．he died in 1931

The suggested plan was to________.

A．turn off the lights in factories and schools

B．observe a few minutes of total silence

C．dim all electric lights

D．shut off all electricity for a short time

Americans fully realized what Edison's inventions meant when they________.

A．heard of his death

B．heard of the plan to honor him

C．first used electric power

D．tried to carry out the plan

The plan was never carried out because________.

A．not everyone wanted to honor Edison

B．it was too difficult

C．electric power was too important to the country

D．it honored only one of Edison's inventions

This passage was probably written to________.

A．tell about Edison's inventions

B．explain electricity

C．prove that people wished to honor Edison

D．show what a great Edison was