单项选择题


Questions 11 to 13 are based on a talk on manga. You now have 15 seconds to read Questions 11 to 13.
What is the reason why manga have to cover a diverse range of themes

A.They have a complex history.
B.They have to attract audience from all age groups.
C.They have to expand it’s market worldwide.
D.They have to increase it’s popularity.