Final answer:
Democrats and Republicans both gained large levels of support from immigrants.
Step-by-step explanation:
The statement below that Democrats and Republicans had in common is d. Each gained large levels of support from immigrants. In the past, both parties attracted diverse voters to their coalitions. Immigrants tended to appreciate the Democrats' ability to separate political and moral questions, making them appealing to Catholics, Baptists, Methodists, and free thinkers. Both parties sought support from different voter groups based on factors such as region, class, ethnicity, religion, and social class. However, it is important to note that the parties have evolved over time, and the issues and policies they support today may differ from the past.