Final answer:
The retreat of the radical position by the early 1990s was influenced by economic liberalization, technological changes, and political shifts.
Therefore, option a is correct.
Step-by-step explanation:
The three reasons that were used to explain the retreat of the radical position by the early 1990s were:
- Economic liberalization: The expansion of free markets and reduction in government regulations allowed for global economic integration and increased competition.
- Technological changes: Advancements in technology, particularly in transportation and communication, made it easier for companies to operate globally and compete in the international market.
- Political shifts: There was a shift in political ideology towards more conservative policies, which favored deregulation and free trade.