What is the main point that Adichie makes in her TED talk when she describes her experience of reading Western children's books?

She is explaining how she only read a 'single story' then and therefore wasn't aware of the possibility of
different narratives.
Shexis arguing that she should not have read those stories as a child.
She is describing how the stories made her want to taste ginger beer.
She is emphasizing that the characters are similar to her.