A It was essential that they be active to maintain a sense of self-worth and dignity. B This develops the theme that humans are resilient and able to find many ways to challenge oppression. C He explains how he and other Jewish people maintained their poise, hope, and sense of self despite the terrible conditions of life in a ghetto. D He also writes that some people were forced to take trains to new ghettos in the countryside.

**Step 1. Read and Understand Each Option** - **Option A:** States that being active was essential to maintain self-worth and dignity. - **Option B:** Interprets the theme by saying it develops the idea that humans are resilient and find ways to challenge oppression. - **Option C:** Explains that he and other Jewish people maintained their \( \text{poise} \), \( \text{hope} \), and sense of self despite the terrible conditions of life in a ghetto. - **Option D:** Describes that some people were forced to take trains to new ghettos in the countryside. **Step 2. Identify What Is Being Asked** The question appears to require identifying the sentence that best explains or supports the idea that individuals maintained their dignity and self-worth despite extremely challenging circumstances. This involves both explanation and detail. **Step 3. Analyze the Options in Context** - **Option A** focuses on the need to be active to maintain dignity, but it doesn’t detail the context or the challenges faced. - **Option B** gives a general interpretation about resilience and challenging oppression rather than specific details about maintaining self-worth. - **Option C** directly explains how, in the face of the terrible conditions in a ghetto, the writer and others maintained their \( \text{poise} \), \( \text{hope} \), and sense of self. This option provides specific details that support the idea in question. - **Option D** simply provides a factual detail about forced relocations and does not address the theme of maintaining dignity or self-worth. **Step 4. Choose the Best Option** Since the task requires showing how dignity and self-worth were maintained despite harsh conditions, the option that offers detailed explanation is the one that directly states that even in terrible conditions the individuals kept their \( \text{poise} \), \( \text{hope} \), and sense of self. **Step 5. Final Answer** \( \boxed{C} \)