How did mikhail gorbachev's program of perestroika contribute to
the collapse of the soviet union?

Perestroika led to food shortages  and extreme inflation, causing public protests and a political uprising within the Soviet government.

Explanation:

A.p.e.x

operation overlord was the codename for the battle of normandy, the allied operation that launched the successful invasion of german-occupied western europe during world war ii. the operation was launched on 6 june 1944 with the normandy landings

the governor can not veto a referendum that the voters approve