How did nationalism and imperialism's go together as powerful ideas in the early 20th century?

What triggered the surge of conservative governments in central europe at the end of world war i? a. the disintegration of european families in the wake of urbanization. b. a worldwide revolutionary upsurge. c. the revival of the austrian-hungarian and ottoman empires. d. the british suppression of the indian nationalist movement. e. the killing of the tsar during the russian revolution?

Which two sentences in this passage talk about china’s efforts to curb environmental degradation?

When was the versailles treaty signed