How did the discovery of an effective vaccine by Louis Pasteur lead to the growth of the Europe's population?

Which of the following was a goal of european conservation in the early 1800

By the end of the 1800s, there was a change in the nature of the immigrants coming to the united states. immigration from northern europe—england, ireland, germany, and scandinavia—declined, while immigration from italy, russia, and austria-hungary grew. in fact, between 1900 and 1910, more than three-fourths of all immigrants came from these three countries. unfortunately, these countries were far removed england, the home of our founders, and the immigrants who came from them had a hard time adjusting to life in their new country.

The committee of correspondence: a)directed colonial militias b)organized boycotts of british goods. c) raised funds for colonial legislatures d) spoke with foreign governments.