Which of the following is an example of a historical claim?

Historical claim tend to be supported by solid evidence for the analyzation. Since you provide no options, an example of a historical claim would be something like :
- The fall of Roman Empire was not because of external forces, but for the most part, it's because of the internalities between their own government"

To have a bunch of countries to team up, and communicate not let the communist break them apart and take over the world