there's no way to lift up roger AFAIK though, only lower his score by condemning him (and asking sophy to not fix his mistake)I actually don't remember this so well right now, but it wasn't so convoluted. There is an internal score your mom have with the interns that will affect her voting (you can ask her how they stand frinday morning)
And your actions influence the score. Sophie, Roger and Rosario starts at the bottom of the list. You just have to make sure Rosario stays at the bottom by lifting the others and making her score drop.
Cheers!
I've tried a few times, currently sophy get's fired standard, if you boost sophy to your mother then roger get's fired
your mother says of rosario that she's handy in emergencies, she did a good job with the explosion (+1 point) and of her rivalry with crystal (-1 point), she doesn't mention anything else and yet no explosion and showing her the picture + praising sophy get's roger fired
it's then that I checked the walkthrough and the path were dana is in the hospital with a great speech is the one where rosario get's fired