Answer:
"Sorrow" and "Grief".
Step-by-step explanation:
Like I say always, I'm not 100% sure about the answer. But I do have explanation. It wouldn't be "treated" or "master", due to the fact it's asking you what they endured. Yes, they did have to deal with being treated horribly and having "Masters" like some sick animal, but that isn't the answer (I hope). "Little" and "Nothing" isn't the answer either, I am at least 90% sure about this. Due to the fact being, yes this is probably how they felt and others thought about them, but they didn't have to endure being and yes, they probably thought they were nothing as well, but that isn't the answer either. Callous and bloody isn't it as well, that was physical and not mental. So that leaves C, "Sorrow" and "Grief".
I really do hope that I helped you out with this, if not then I'm terribly sorry.