Which was a cause of world war i?
a. political revolutions in europe left nations unstable.
b. the second industrial revolution led to international rivalries.
c. europe’s system of military alliances enlarged small conflicts.
d. russia’s race to industrialize threatened the economy of other european countries.

Which of the following are characteristics of effective government leaders? select all that apply : has accumulated enough wealth to operate the government : willingness to accept responsibility : keep a government strong and active : has be a successful in the entertainment field : act as a final point of authority