What is the most likely reason some former communist nations refused to adopt the euro as their currency?
they hoped eventually to return to a communist government.

they had a strong economy and didn’t need a new currency.
they felt unready or unwilling to merge with the european union.
they suspected the euro would lead to debt problems in the future.

The right answer is the third (C).

The countries of Eastern Europe went through a traumatic experience when they joined the former USSR. When the system collapsed, thousands of people died, public services have turned out to be awful, and these countries, which took many years to recover, are still suffering from the backwardness of the economy.

In this way, joining another bloc reminded us of the previous bad experience, causing some countries to become initially indisposed.

They felt unready or unwilling to merge with the European Union.