WHY DOES THE WRITER USE THE EXAMPLE OF THE AEROPLANE

Câu 23:

Why does the writer use the example of the aeroplane?

A.

To explain how space travel started.

B.

To explain why transport changed in the 20

^P

^th

^P

century.

C.

Because he thinks it's the most important invention inhistory.

D.

To show how an invention developed quickly.