Final answer:
Among the options, reading a book about a child with a disability and discussing it in relation to their own experiences is the most effective way for 3-year-olds to develop respect for differences in the classroom. This is because it's an engaging, age-appropriate activity that teaches empathy and understanding for diversity through relatable narratives.
Step-by-step explanation:
When considering activities that would best help 3-year-olds develop respect for differences among people in a classroom setting, it's important to choose those that are age-appropriate and engaging. Option D) Reading a book about a child with a disability and relating it to their lives, is particularly effective in fostering this respect for diversity among young children. This method aligns with known educational and socialization practices where children learn about different roles and viewpoints through relatable situations and stories.
By reading a story about a child with a disability and discussing how it relates to their own lives, children can develop empathy and understanding for individuals who may be different from them. This activity is hands-on and can be integrated into their daily classroom experience, providing a practical and inclusive approach to learning about diversity. Importantly, the narrative can be framed positively in keeping with the concept of Unconditional Positive Regard, reinforcing the idea that all people have inherent value regardless of their abilities or backgrounds.