Has the principle of comparison been addressed in this experimental design?
A
No, because a placebo ball was not used, a comparison cannot be made to determine if the new ball travels significantly farther.B
No, because all of the new type of balls are not hit first, the distances they travel cannot be compared to the distances of the original ball.C
Yes, because the original ball type is included in this experiment, the distances the different balls travel can be accurately compared.D
Yes, because the balls are randomly selected, the distances of the new ball can be compared to the distances of the original ball.