What is an absorbent material commonly used to clean up spills?

An absorbent material commonly used to clean up spills is critical in addressing various types of liquids, from oils to chemical substances. The correct answer encompasses all the listed options, each of which effectively serves as a spill cleanup material.

Speedy Dri is a commercial product designed specifically to absorb spills, particularly used in automotive and industrial settings. Activated charcoal, while primarily known for filtering and purifying, can also be effective in absorbing certain types of spills due to its porous nature. Kitty litter, a commonly used absorbent in households, is specifically formulated to soak up liquid waste, making it very effective for cleaning spills.

Using a combination of these materials allows for flexibility depending on the type of spill being addressed—whether it be in a home, workplace, or specialized environment. This comprehensive approach ensures that various scenarios are covered when managing spills, making "all of the above" the best answer.