The term means to speed up the tempo over time a. decresando b. score c. rhythm d. accelerando

The answer is D, accelerando.

A  documentary film  is a nonfictional motion picture intended to document some aspect of reality, primarily for the purposes of instruction, education, or maintaining a historical record.example: farenheit 911

Perhaps the changes well be new machines that can get the job done faster and same time, there is enough space to keep on building.