If you notice, there’s almost no appearances by Hillary Clinton on this episode. Susan Rice carries a massive amount of interview time on it. She was the only semi-believable person of the entire group....which is sad to say. And after you finish all her comments...you realize there’s various problems with the story.
I think they used her because she didn't know anything about it, which means she couldn't slip up and give something away under questioning. All she knows is what's in the script, so that's all she can tell them.