In context with the influence of landed aristocracy in historical governance, consider the following statements:

Answer: All four
Notes:

• The landed aristocracy often acted as kingmakers during succession wars: Correct. Their military strength often influenced the outcomes of royal successions.
• Rajputs migrated to Malwa and Gujarat due to Muslim invasions: Correct. This migration was a response to territorial pressures and conflicts.
• The wanta system was a reform introduced by Sultan Ahmad Shah I in Gujarat: Correct. This system altered land revenue collection and governance.
• Primary zamindars were generally more powerful than intermediary zamindars in regional states: Correct. Primary zamindars had greater influence in the mainland compared to their peripheral counterparts.

Thus, all four statements are correct. The correct answer is (C) All four.