What was a major catalyst for World War I? Unrest of the poor and oppression of the weak would be major issues prompting World War I.
Treaties that forced many countries to get involved if an alliance member was attacked.
European countries invading each other for land.
Empires granting their colonies independence, leaving them to fend for themselves.

B. Treaties that forced many countries to get involved if an alliance member was attacked

Explanation:

.elections are held to determine who serves in congress.

consider an orange peel: if you want to try and lay it flat, you have to stretch it, we know exactly how things are being stretched or squashed at any given point. we have many different map projections because each has different patterns of some projections can even preserve certain features of the earth without