What is true about the waltz?

The waltz is indeed a ballroom dance characterized by its rhythm in triple time, which means it has a strong emphasis on the first beat of each measure, contributing to its flowing and graceful style. This 3/4 time signature is defined by the pattern of one strong beat followed by two weaker beats, allowing dancers to execute smooth turns and movements that reflect the music's rhythm.

The dance also represents a significant development in social dancing and has evolved to become an iconic dance within ballroom culture. While waltz does have associations with various countries, particularly Austria and Germany, it is primarily recognized and celebrated as a classic ballroom dance form that is widely taught and performed globally.

While other choices contain elements that may seem related, they either misrepresent the time signature or the cultural origins of the dance, thus making option C the most accurate depiction of the waltz.