Answer:
A
Explanation:
this is because slavery is being compared to not being bound therefore being a metaphor
We're at the midway point in the novel here, and introduced to Shmuel, Bruno's friend on the other side. But there's a catch: Shmuel isn't the only boy who wears striped pajamas, and no, we're not talking about his fellow prisoners. We dig into this big time over in the "Symbols" section, so be sure to check it out, but right now we'll leave you with this: Bruno puts them on, too. And when he does, we're pretty sure he's the boy in striped pajamas the title refers to.
He did it because they were socs and he's a greaser, and he knew messing with them would get them agitated. I think he did it to make fun of them.