The correct answers are A, B and C. The statements describe the period known as the Hundred Days, which comprises from March 20, 1815, the date of Napoleon's return to Paris from his exile in Elba, until June 28, 1815, the date of the second restoration of Louis XVIII. as king of France. This period ends the so-called Napoleonic Wars, as well as the French empire of Napoleon Bonaparte.
The only event that didn't lead to Napoleon's final defeat at Waterloo is the one described in statement D, because it is the description of the battle itself and not of a leading event.
