Cuando Ann usa "must" en lugar de "have to” en la siguiente oración"I must arrive early to my dancing class because I'm going to becomeprofessional dancer” es porque :She is making a promiseIt's an ob?

Cuando Ann usa "must" en lugar de "have to” en la siguiente oración "I must arrive early to my dancing class because I'm going to become professional dancer” es porque : She is making a promise It's an obligation She doesn't like the idea of becoming a dancer She really wants to become a dancer and it's commited to that. ​.