What was the name for the disease that killed somewhere between 33% - 50% of Europe in the Middle Ages

Is this statement true or false? before 1850, workers in american mines, mills, and factories were poorly paid, but their safety on the job was always protected by strict laws.

Why did european nations face financial challenges after world war 1?

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.