Final answer:
The district court is most likely to apply Wyoming law in this negligence case.
Step-by-step explanation:
The district court is most likely to apply Wyoming law in this negligence case. While it is undisputed that California has the greatest interest in the resolution of the case because both parties are citizens of California, the traditional rule is that a negligence case is governed by the law of the place of the injury. Although the Wyoming Supreme Court has applied a more flexible approach in analogous cases, where it applies the law of the state with the greatest interest, they have not directly applied this approach to a negligence case. Therefore, the district court is most likely to follow the traditional rule and apply Wyoming law.