I think the correct answer would be the second option. The Soviet Union joined the allies because Hitler had broken a pact and attacked. The pact was called the German-Soviet nonaggression pact. This pact was regarded by Hitler as a tactical move. It was signed on the year 1940 and after a year Hitler attacked the Soviet Union.
<span> The four trends that pushed Europe toward war in the late 1800s and early 1900s were:
1- The alliance system
2- Militarism: which means that either the government or the people or both desired to keep a very strong military capability. This military capability was then used aggressively to spread the country's interest and promote them.
3- Nationalism: which means that there was a group of different systems (political, economic and social) working on promoting interests of a particular nation in order to gain </span> self-governance<span>, or full </span>sovereignty<span>, over the group's </span><span>homeland.
4- Imperialism: which means that the country actually expanded its power by </span><span> the acquisition of </span><span>territories</span>
Answer:
Corruption in the Catholic Church encouraged the idea for reform. The sale of indulgences.
