Answer:
The correct answer is:
C) The ratification of the 19th Amendment to the U.S. Constitution.
Step-by-step explanation:
In the passage, it is explicitly mentioned that "In 1920, the 19th Amendment to the U.S. Constitution was ratified, granting American women the right to vote." This sentence directly states that the event granting American women the right to vote was the ratification of the 19th Amendment to the U.S. Constitution in 1920. Therefore, option C is the correct answer.