When western European countries adopted the Euro, they were hoping to ensure the stability of a while still enjoying the flexibility of a

1. Economic Union

2. Autonomous and Sovereign country

Explanation:

The Euro was established on January the 1st in 1999. Its purpose was to unite the countries of the Eastern and Western Europe. But not only that, it's main purpose was to help economically all the countries of the European Union; by having a same monetary system, the economy would flourish and build from it, making each country as strong as everyone else. Besides, all countries within the European Union would be autonomous and the would dictate their own rules; in other words, they would remain sovereign, without having anyone making decisions from the outside.

answer; collectivism;