Answer and explanation:
About the difference in value between total contribution and the lump sum I can say that with a lump sum we are more likely to receive the money all at just on moment. This can lead us to waste all of our money all at once. The total contribution sometimes is not as much as we were waiting for it is still useful so we can track of how much money we are spending.
The term that is used for this difference is annuitization.
That would have to be C. Because most artists would not have a motive to do anything if they were not inspired to do so.
I think it looks great already! Maybe color in the Bs.
The texture would be heterophony, if the musicians have used
the same melody in unison. This type of texture has a line of which it only has
a single melody with its simultaneous variations. This type of texture could be
incorporated with two or more performers.