Read the conclusion to an informative essay. the invention of the printing press was a turning point in history. in addition to increasing the availability of books and the spread of new ideas, it also led to significant political change and radical changes to the religion of europe. this forever altered the course of history. which phrase best supports the conclusion about the printing press? 1.“invention of the printing press”2.“turning point in history”3.“spread of new ideas”4.“altered the course of history”