Based on the options provided, the two sentences that could be used to create a summary of the passage are:
- A. In the late 1800s and early 1900s, many children worked long hours, often under dangerous conditions.
- C. The horrible working conditions for children inspired a reform movement that placed limits on child labor.
Sentence A highlights the historical context of the late 1800s and early 1900s, where many children were subjected to long hours of work in unsafe conditions. This sets the stage for the issue being discussed. Sentence C introduces the response to the problem mentioned in Sentence A. It explains that the horrible working conditions experienced by children led to a reform movement that aimed to establish limits on child labor. This shows the response and action taken to address the issue. By combining these two sentences, we capture the problem (child labor under dangerous conditions) and the solution (reform movement for child labor limits), providing a concise summary of the passage.