For All Their Promising Beginnings, the Revolutions of 1848 Ultimately

For all their promising beginnings, the revolutions of 1848 ultimately ended with the restoration of the presumably overthrown regimes for all of the following reasons except

A) That the alliance between liberals, radicals and socialists was one of convenience and broke down when these groups gained power
B) That nationalists consistently allied with conservative forces to crush revolutionary movements
C) That the strength of conservatism was underestimated; the working class of central Europe was weak, ultimately weaker than conservative forces
D) That forces of order never lost control of their armies, which they used to crush revolutionary forces