Answer:
the UK's economy
Step-by-step explanation:
The European Union is a political and economic union of 27 European countries that aims to promote economic prosperity and cooperation among its member states. Joining the European Union would have provided the United Kingdom with access to the EU's single market, which allows for the free movement of goods, services, capital, and labor among member countries. This could have potentially benefited the UK economy by increasing trade opportunities and economic integration with other EU member states.
It is important to note that the decision to join the European Union and the expected benefits or outcomes of membership can be complex and multi-faceted, and opinions on this matter may vary. Additionally, the United Kingdom held a referendum in 2016 in which the majority of voters chose to leave the European Union (commonly known as Brexit), and the UK officially left the EU on January 31, 2020. The topic of the UK's relationship with the European Union is complex and has implications across various areas such as economics, politics, and international relations.