Why not "Elle est une actrice...."? I tried it and was marked wrong.
Putting an article is wrong in this case. If you want to use the pronoun "elle" in this sentence you have to write "Elle est actrice..."
It doesn't accept this solution either
I put "Elle est actrice qui fait de la danse russe" and it wasn't accepted. Duo got me stirred crazy sometimes.
You can't say that. You can say: "Elle est actrice. Elle fait de la danse russe." but not "Elle est actrice qui..."