Was the compromise of 1850 a political, economic, or social issue

What would lead a historian to consider two events to have a relationship of correlation rather than causation

What stalled germany's initial invasion into france in 1914

In the 1980s, more russians worked to encourage change in the government by a) establishing a new political system. b) rallying for democratic reforms. c) supporting the democratic system. d) resisting gorbachev’s reforms.