Which describes the main difference between perestroika and glasnost?

Perestroika produced more freedoms in civilian life, while glasnost reduced military power.
Perestroika reformed the military, while glasnost reduced government oversight of the economy.
Perestroika dismantled nuclear weapons, while glasnost reduced government oversight of journalists.
Perestroika relaxed government control of the economy, while glasnost expanded freedom of the press.