A divisive "rhythm is a rhythm in which a larger period of time is divided into smaller rhythmic units or, conversely, some integer unit is regularly multiplied into larger, equal units
and this can be contrasted with "additive rhythm" in which larger periods of time are constructed by concatenating a series of units.
It means that it is addition of rhythm
and measures increase in size as the piece progresses
So,
Answer is
D. measures increase in size as the piece progresses
A troublesome "beat is a mood in which a bigger time frame is partitioned into littler musical units or, on the other hand, some whole number unit is routinely duplicated into bigger, level with units furthermore, this can be appeared differently in relation to "added substance beat" in which bigger time frames are developed by connecting a progression of units. It implies that it is expansion of mood furthermore, measures increment in size as the piece advances
