There were many more than three but the three main ones are the assassination of Archduke Franz Ferdinand, the rise of Nationalism, and the building up of military and alliances.
The correct answer is D) contour lines.
The elevation is shown on a topographic map in contour lines.
If we see a topographic map, the first thing we note is the contour lines. These lines connect points with the same elevation. This helps to see the elevation of the geographical feature and the shape of the land. On a topographic map, you can also see the index contour and the contour interval. This information helps people to read a topographic map.
The correct answer of the given question above would be SIT-INS. The action that would be considered as an Act of Civil Disobedience is Sit-ins. Civil disobedience is the active refusal follow certain laws, policies, demands or commands. Hope this answer helps.
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