Brexit transition period concluded on

Brexit’s transition period ended 31 December 2020 allowing the UK to finalize its EU exit. This question tests knowledge of global political events. The UK left the EU 31 January 2020 but the transition maintained EU rules until year-end. Option A is too early and option C reflects the exit not transition end. Understanding Brexit timelines is crucial for international relations studies. The transition ensured smooth trade and policy adjustments. Correct knowledge aids in analyzing global economic shifts. This date is vital for discussions on post-Brexit trade or geopolitical changes ensuring accurate historical context in academic or professional settings.