Which of the following is NOT mentioned in the passage as an area of dance that Isadora Duncan worked to change

A．Because each nation wants to keep its characteristics.
B．Because they are designed by different artists from 8 countries.
C．Because it will enable the blind to distinguish between them easily.
D．Because Denmark and other countries want to have their own coins.

A．Because the Japanese like taking photographs.
B．Because the Japanese like writing letters to each other.
C．Because the Japanese postal officials want to print a special stamp to catch worldwide attention.
D．Because the Japanese postal officials hope these stamps will help promote interests in letter-writing.