The cocklebur (Xanthium strumarium) is native to North America, but it is also found in various regions around the world, particularly in areas with similar climates. Among the options given, cockleburs are also found in India and parts of Australia and South Africa, albeit not necessarily as native species. However, the most accurate choice in the context of being "naturally found" outside of North America is:
None of the above, since it is considered native mainly to the Americas and has become invasive in other regions after being introduced.