Final answer:
The ranking that indicates the largest splash size is 4.
Step-by-step explanation:
The ranking that indicates the largest splash size is D. 4.
When objects are dropped into water from a height, the size of the splash depends on the velocity or speed at which the object hits the water. The larger the velocity, the larger the splash.
In this case, since the objects are of the same size and dropped from the same height, the ranking of the splash sizes would correspond to the ranking of the velocities of the objects. So, the largest splash size would be associated with the largest velocity, which is indicated by ranking 4.