Question

what does a heavy - duty cordless drill have that is different from a typical cordless drill?
o voltage rating
o keyed chuck
o variable speed adjustment
o battery pack

Explanation:

Heavy - duty cordless drills often have more advanced features. While voltage rating, keyed chuck, and battery pack can be present in both typical and heavy - duty cordless drills, variable speed adjustment is a more common and distinct feature in heavy - duty models for greater versatility in different tasks.

Answer:

C. variable speed adjustment