Answer:
Rafferty thought that he should not be looking at them he did not want the aliens to see him looking at them, so he look slyly at them. It is also indicative of the fact that rafferty suspected them as no ordinary creatures but a fraud.
2. The whole Nazi environment probably aided to these Sonderkommandos becoming collaborators, from seeing everyone around you either fleed, killed or tortured is enough to make people to make choices like that. It was a live or die situation and under those circumstances, anything could happen.
3. Levi and Langer want us to see this situation from the Sonderkommandos point of view, where virtue and morality don't apply and the only choice is to kill/ follow the Nazi orders or be killed. They probably thought that by taking on this task there was a chance of survival.
4. The choices that we make help us to develope as person and in our personal identity, and in the absence of meaningful choices it can confuse us in our identities, and can lead us to make critical descisions.
The answer is A love & family relationships