Correct option is D
Both A and R are true and R explains A
The assertion that teaching social studies is important at the elementary stage is fundamentally true because it plays a crucial role in sensitizing children to social issues and developing in them a respect for difference and diversity. Introducing social studies in early education lays the groundwork for understanding complex societal structures, historical contexts, and cultural variations. This foundational knowledge fosters empathy, promotes inclusiveness, and prepares students to participate actively and respectfully in a diverse society. By embedding these values in elementary education, social studies teaching ensures that students grow up with a well-rounded perspective on the world and the varied experiences of its people. Thus, the reason given directly supports and explains the importance of teaching social studies at an elementary level, highlighting its role in shaping informed, empathetic, and socially responsible individuals.