Over the last two centuries per capita GDP around the world has increased at unprecedented rates, and trade between countries has grown. Would you say:

Group of answer choices

This is conclusive proof that international trade makes countries wealthier.

This is conclusive proof that as countries become wealthier they engage in more international trade.

Economic growth would likely have been still greater if countries hadnot traded.

In order to determine if tradecaused economic growth we would need to identify some exogenous factor that led to more trade between countries but was not necessarily, in and of itself, a driver of economic growth.