To determine which object would reach 100 feet in the least amount of time, we need more information about the objects in question, such as their initial velocities, accelerations, and any forces acting upon them (like gravity or air resistance).
In the absence of specific details about Objects A, B, and C, we cannot definitively answer the question. However, if all objects are projected upwards under the influence of the same gravitational force (assuming they are all in free fall), they would reach 100 feet at the same time if they start from rest and fall freely.
If you have any specific parameters for each object, please provide them for a more accurate analysis.