How did the Napoleon Bonaparte from the first French Revolution (1789-1815) influence the revolutions of 1848?

Select the best answer from the choices provided.
A.The 1848 revolutions were kicking out the governments Napoleon had left in place.
B.Napoleon's example had shown the military and political power of revolutionary nationalism.
C.Napoleon returned to lead the brief Roman Republic until it was crushed.
D.Napoleon's love of democratic republics inspired socialists and liberals across Europe.