Which topic sentence best applies to this passage?

ballet is a difficult art to learn. this dance form requires great flexibility and body strength. in addition, the dancer must memorize each and every movement of the performance. a choreographer creates the ballet steps and a dancer learn them. ballet includes several types, such as french, italian, and russian ballet. an example of traditional ballet is the stabat mater, where the dancers move in a way that shows sadness.

a.
ballet goes against traditional notions of dance and focuses more on expressing emotions.
b.
ballet is a form of dance performed in france, italy, and russia.
c.
ballet is a performance dance that requires great skill and dedication.
d.
ballet is a contemporary form of dance that narrates a scene or a story.