Which country became a full member of EU in January 2023

Croatia officially became the 27th member of the European Union in January 2023. This came after years of preparation reforms and negotiations with the EU. Joining the EU means Croatia now benefits from access to the single European market free movement of people and goods and participation in EU institutions. Membership also strengthens its political economic and cultural ties with Europe. Croatia entry is considered a success for EU enlargement policy which focuses on integrating more states to promote unity peace and development across Europe. Therefore the correct answer is Croatia option D.