Which of the following statements about language in East Asia is false?

A.
Written language is based on classical Korean script.
B.
Calligraphy is an important art form, and it takes many years to learn how to create Chinese characters.
C.
The exact same written characters are used in all Chinese dialects and in Japanese.
D.
Across cultures in East Asia, many people cannot communicate by speaking, but can read the same writing.