The graph shows the growth of national income in the Soviet Union between 1960 and

The graph shows the growth of national income in the Soviet Union between 1960 and 1985. What is the best conclusion that can be drawn from this graph?

The social reforms introduced by Khrushchev were not working.
The Soviet economy was benefiting from Brezhnev’s leadership.
The Soviet economy was stagnating under Brezhnev’s leadership.
The social reforms introduced by Khrushchev led to tremendous income growth.