With the introduction of rock and roll dance forms and performers, dancers began to include what aspect into their social dance?
a. elaborate floor patterns
b. moving interdependantly as a unit
c. female lead partnerships
d. solo improvisations

Option D.

Explanation:

Solo improvisations began to occur after the introduction of rock and roll dance forms among their performers.

they most likely have a instrumental version. just look it up on google.

the answer is counterpoint.

counterpoint definition: "the art or technique of playing a melody or melodies in conjunction with another, according to fixed rules."

counterpoint is present in a lot of baroque music- such as bach (notably his wtc prelude and fugues) and scarlatti, but can also be found in music by mozart, beethoven. it can even be found in music as modern as john williams!