To compare Mexico’s and Argentina’s economic success post-World War II using the provided responses, the most relevant statement is:
They both nationalized industries that were economic problems.
Both countries engaged in nationalization efforts at different points in their histories to address economic issues. In Argentina, significant industries, including railways and utilities, were nationalized. Mexico did the same with its oil industry, nationalizing it in 1938 and establishing PEMEX. These actions aimed to gain greater control over their economies and resources, though the effectiveness and outcomes varied between the two nations.
The other statements do not accurately reflect the comprehensive dynamics of each country's post-war economic strategies or realities.