Final answer:
The correct answer to the question about common voltages used to power portable electric drills is C) 12V and 24V, as these are typical for battery-powered drills.
Step-by-step explanation:
The common voltages used to power portable electric drills are usually those that can be provided by batteries or standard household outlets.
For portable drills that are battery-powered, the typical voltages are 12V and 24V. Therefore, the correct answer to the question is C) 12V and 24V.
Household AC outlets supply a different range of voltages, such as 120V or 220V, which are more suitable for stationary power tools or appliances.
Portable drills often use lower voltages to ensure they are safe, lightweight, and convenient for users on different job sites or projects.