The number of beats in a measure depends on the time signature of the music. However, commonly used time signatures include:
- 2 beats per measure (e.g., 2/4 time)
- 3 beats per measure (e.g., 3/4 time)
- 4 beats per measure (e.g., 4/4 time)
Since all the options (2, 3, 4, 8) are valid depending on the context, the most frequently occurring time signature in popular music is 4 beats per measure (4/4 time). Therefore, if you need to choose one option from the provided responses, the answer is:
4