Although a number of things brought about world war i, there was one event that pushed europe over the edge. what was that event?

a. the english naval blockade of germany
b. invasion of east prussia by russia
c. assassination of archduke ferdinand
d. the october russian revolution

I believe the answer is: C. assassination of Archduke Ferdinand

Archduke Ferdinand of Austria was assasinated by a terrorist named Gavrillo Princip, which is a citizens of Serbia. This create a massive tension between the two countries which lead up to both of them seeking alliances to strengthen their millitary and eventually ended up in the world war I.

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

it is the code of hammurabi