What were the primary consonances of organum during the early Middle Ages?

Which statement best describes this selection?

a) balance is sacrificed because upper voices move at a quicker rate than do lower voices b) stratification of voices because lowest moves at a slower rate than upper voices c) stratification of the various voices given that the lowest moves at a much quicker rate compared to the relatively slow-moving upper voice d) balance between voices is striking given that they move simultaneously

Jamaican style R&B is known as

A. soul. B. salsa. C. ska. D. R&B.