Answer: The District of State C and the District of State A.
Step-by-step explanation:
The federal district or districts whereby the venue is proper is the District of State C and the District of State A. It should be noted that the federal venue in a civil action will be proper in the district whereby part of the events brought about the claim that occurred.
In this case, the proper venue is the District of State C as a substantial part of the events brought about the claim that occurred there. Also, during the time that the accident took place, the domicile of the man was in State A.