I never got that trailer, especially the monologue over it (which I believe is in the books, but not in this specific context), unless I'm missing some deeper meaning, Geralt says he'd rather not choose at all, and then proceeds to 'choose'.
The meaning is that Geralt is tired as f-ck of all the cruelty going on in the world. For the longest times he tries to stay out of things, but in that moment, he basically have had enough and decides to choose to act. If she is guilty it is the lesser evil.
If she is guilty its the lesser evil and one that he can not do that much about.
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As for my choices:
Reasons of State:
Stood by My friends Roche, Ves and Thaler. Dijkstra confirmed to be crazy when he attacked us with a few men. My Geralt is loyal first and foremost to his friends and his principles.
The Tree.
My Geralt did all the research he could on the tree, read books, listened to stories, even hang out some in the Downwarren to see if any of the workings of the spirit manifested itself in the village. My Geralts conclusion was that while the spirit of the tree might indeed be of the less agreeable kind and probably what remained of a Relict kin to the crones, he took a leap of faith in freeing it because it was the best chance to save the children. My Geralts hope was that the spirit could possible help him against the crones if a confrontation came to pass and that he could hunt down the spirit bound to the horse if needed be.
The Baron.
My Geralt tried to help him as much as possible, although heavily criticizing his alcoholic and domestic behaviour. Dea was given her name and turned into a Lubberkin