A majority of 100 U.S. senators would be more than half of the total. Since half of 100 is 50, a majority would require at least 51 senators. However, 51 is not one of the response options provided. Given the options available, the closest correct answer with respect to understanding majority would be 50, but it should be noted that this does not constitute a majority.
From the provided choices:
- 1
- 25
- 50
- 75
The correct answer regarding which would constitute a majority (not included in options) is 51. However, the best option in the context of your question is 50 since it is the closest option.