Answer:
A) What is the effect of air resistance on the cannonball?
Step-by-step explanation:
In scientific investigations, we seek to gain more understanding and insight so as to better or improve already existing models.
Every other question asked does not in anyway affect the shooting or flight of the cannonball and as such has no effect on how far the cannonball would fly, however, air resistance has ample effect on both the speed and distance of the cannonball and as such, this is a question that can prompt investigation in the laboratory.