Answer:
Answer is option b.
Explanation: On August 24,1814 British Troops invaded Washington DC and then set fire to White House after defeating American troops at the battle Bladensburg. This incident happened after recent defeat of Napoleon at the battle of Waterloo. After defeating Napoleon, Britain was able to use their force against America as they started war at 1812. Before defeating Napoleon, Britain adopted defensive strategy against America. But after defeating Napoleon they got offensive to America and attacked Washington.