What did scientist study to develope the geologic time scale?

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?

How did the growth of the middle class affect social reform during the industrial revolution?

Name at least three countries neaolpeon controlled