Final answer:
Hugh Gaitskell made his 'end of a thousand years of history' speech in C) 1961, expressing his opposition to the UK joining the European Economic Community.
Step-by-step explanation:
The 'end of a thousand years of history' speech by Hugh Gaitskell was made in the year C) 1961.
Gaitskell, leader of the Labour Party at the time, made this famous speech in opposition to the United Kingdom joining the European Economic Community, which he believed would mean the end of Britain's independent nation status. This event is a key moment in the history of British politics and European relations.