Answer:
D. Middle-class girls often had to do chores, while middle-class boys played with toy soldiers.
Step-by-step explanation:
In the context given, the option D indicates that middle-class girls were typically assigned household chores, while middle-class boys engaged in play with toy soldiers. This suggests a gender-based division of labor and expectations within middle-class families during that time. Girls were expected to help with household tasks and responsibilities, while boys were encouraged to engage in imaginative and active play. It's important to note that this answer is specific to the given options and does not encompass the full range of possible differences between the experiences of middle-class girls and boys during that era.