The correct answer is option 'D' - Preventing social change.

Explanation:
Teaching Social Studies in schools aims to provide students with a comprehensive understanding of the society in which they live. It helps in developing critical thinking skills, promoting civic engagement, and fostering a sense of responsibility towards the community. The subject encompasses a wide range of topics including history, geography, economics, and political science.

Development of Good Citizenship:
One of the aims of teaching Social Studies is to develop good citizenship among students. This involves instilling values such as respect for others, empathy, and understanding of diverse perspectives. By learning about the rights, duties, and responsibilities of citizens, students are prepared to actively participate in democratic processes and contribute positively to society.

Development of Social Behaviour:
Another important aim of teaching Social Studies is the development of social behavior. This includes promoting positive interactions, interpersonal skills, and conflict resolution strategies. By studying various social issues, students learn to appreciate differences, develop tolerance, and work collaboratively towards achieving common goals.

Development of National and International Understandings:
Teaching Social Studies also aims to develop national and international understandings among students. This involves learning about the history, culture, and geography of their own country as well as other nations. By studying different societies and their relationships, students gain a broader perspective on global issues and develop a sense of interconnectedness.

Preventing Social Change:
The option 'D' - Preventing social change, is not an aim of teaching Social Studies. In fact, the subject encourages students to critically analyze social, political, and economic systems. It equips them with the knowledge and skills to challenge existing norms and advocate for positive social change. By understanding the complexities of society, students are empowered to be agents of change rather than passive observers.

In conclusion, teaching Social Studies in schools aims to develop good citizenship, social behavior, and national and international understandings. It does not aim to prevent social change but rather encourages students to critically engage with society and actively contribute to positive transformations.