we know that
Additive meter:
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
