The wall of reaction created in Europe by Metternich and other conservatives really collapsed with the

A) Peterloo Massacre
B) Decemberist Revolt
C) Sucess of the Greek Revolution against turkey
D) the 1830 JUly Revolution in france

I think it is D

4 answers

I agree. I don't see the phrase "Wall of Reaction" used in this context with a Google search, but the period in which "Divine Right of Kings" was reestablished by the Conress of Vienna is often called the "Period of reaction". The July 1830 French revolution began the collapse of that era, as Constitional monarchies and liberalism became major trends.
Yea i thinks its D also... all the other answers are not as good, so im goin with that

Palmer. Page 462 is what ive found
Right under the purple section...
Yep its def D
Yeah its D b/c i just got that question on my AP Euro test right