b or c I'm not completely sure
Answer:
B
.The historical documents about the invention of fireworks have been lost.
The central idea of that topic is the fact that there is a maturity factor of driving. As a driver myself you can tell who has been driving for a a decent amount of time and who is a new driver. So in conclusion it is just the fact of maturity
Customs, because it’s a way of doing just like tradition
The mass of the object and its speed.
