To study the political causes for a city's rapid development, the historian can research the following types of historical records:
1. Election records with information reflecting disagreements among government leaders:
- By examining election records, the historian can gain insights into the political dynamics within the city, including conflicts and disagreements among government leaders that may have influenced the city's development.
2. Documents discussing legislation passed by those in power:
- Analyzing documents related to legislation passed by the governing authorities provides valuable information about the political decisions and policies that shaped the city's growth and development over time.
These two types of historical records would offer the historian substantial evidence and context to investigate the political factors contributing to the rapid development of the city. Other records, such as information on natural resources, a bestselling book, or personal letters, might not directly provide the necessary political insights needed for this specific study.