How did the printing press help spread the prostestant reformation?

Propaganda during the Reformation, helped by the spread of the printing press throughout Europe and in particular within Germany, caused new ideas, thoughts, and doctrine to be made available to the public in ways that had never been seen before the sixteenth century.

Explanation:

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the american rail road was the most influential and useful transportation system developed in the 1800's with steam locomotives and in the very late 1800's and early 1900's diesel electric locomotives being used to transport goods and people around the newly expanded united states!

b. sec, foreign relations