The invention which did the most to help spread Luther's ideas, as well as those of his opponents, and thus make
the Reformation an international phenomenon
was the
A radio
astrolabe
printing press
lateen sail



Answer :

Final answer:

The printing press was instrumental in spreading ideas during the Reformation.


Explanation:

The printing press, invented by Johannes Gutenberg in the 15th century, played a crucial role in spreading ideas during the Reformation. It enabled the rapid dissemination of information, including Martin Luther's critiques of the Catholic Church, across borders, leading to the Protestant Reformation becoming an international phenomenon.


Learn more about Printing press and the Reformation here:

https://brainly.com/question/40767436