The Answer would be 3. those brought through the space trade in Africa.
The Reagan Doctrine was Reagan's foreign policy during his presidency. The goal of this policy was to aid individuals all over the world in their fight against communism. Two examples of this include:
1) The United States giving aid to Cambodian citizens who were resisting the communist ruler of the country.
2) Reagan gave support to the Contras in their fight for freedom from a corrupt government in Nicaragua.
Gorbachev's policies of perestroika and glasnost allowed for less government control of the economy, more freedoms for the individual citizens, and the ability of the newspapers to print what they want about the government without fear of retribution. All three of these factors helped in ending the communist system in the Soviet Union, as the government significantly decreased their role in Russian society.
