Answer: I think the answer is Riverbed. Let me know if I'm right or not.
Gorbachev pursued glasnost and perestroika reforms because the Soviet economy could not keep up with the arms race. The correct option among all the options that are given in the question is the first option. The war of Afghanistan was proving a bit heavy on the Soviet economy. To stabilize the economy, Gorbachev pursued such policies.
Insuring domestic tranquility is simply meaning they are keeping the peace within the country, city, town, or state. Mainly to keep things like the civil war, ww1, ww2, and the cold war from happening again.
A Less land was cleared for farming. With better ways to farm land less land was need to increase the yield(the amount you get)
B population increased. Because their was better yields more people could be fed and not have to worry about starvation
C Trade and industry grew More yield means more to sell.
