When was the tower completed?
D
Correct answer
Explanation
The Eiffel Tower was completed in 1889 after two years of construction (1887-1889). It was built as the centerpiece for the 1889 World's Fair (Exposition Universelle) in Paris, which celebrated the centennial of the French Revolution. All other dates are incorrect - construction hadn't even begun in 1864, 1872, or 1880.