Final answer:
Prime Minister Margaret Thatcher led the United Kingdom against Argentina in a fight for the Falkland Islands.
Step-by-step explanation:
The correct statement about Prime Minister Margaret Thatcher is c) She led the United Kingdom against Argentina in a fight for the Falkland Islands. In 1982, under Thatcher's leadership, the United Kingdom fought against Argentina in a conflict over the Falkland Islands in the South Atlantic. The conflict, known as the Falklands War, resulted in the UK successfully reclaiming control over the islands.