Which two descriptions fit a major character in a story?

a character who serves only to help develop other characters
a character with a complex and realistic personality
a character with a very simple or two-dimensional personality
a character whose actions advance the plot
a character who doesn’t change during the story

Question

Which two descriptions fit a major character in a story?

a character who serves only to help develop other characters 
a character with a complex and realistic personality 
a character with a very simple or two-dimensional personality 
a character whose actions advance the plot 
a character who doesn’t change during the story

Vocaloid · Answer

Well think about some main characters from books/movies/etc.

1. Compared to supporting characters, do main characters tend to have simpler personalities or more complex personalities?
2. Do main characters advance the plot or are they just meant to support other characters?