Which of the following reasons is the best possible explanation for the changes in Europe's population since 1750?

 A- An increase in scientific and medical discoveries improved life expectancies.
 B-Political revolutions caused a shift from absolute to constitutional monarchies. The C-Enlightenment encouraged European peasants to increase their family sizes. The D-Scientific Revolution led to a sharp increase in immigration.

Which of the following reasons is the best possible explanation for the changes in Europes population since 1750 A An increase in scientific and medical discove class=