Which statement about combination locks is true?

Which statement about combination locks is true?

• A. A combination lock is only portable.
• B. A combination lock cannot be a built-in lock.
• C. A combination lock can be a built-in lock or a padlock.
• D. A combination lock is always digital.

Answer: (C)

Combination locks come in different forms, so they aren’t limited to one style. A lock that uses a sequence of numbers or symbols can be implemented as a padlock you carry or as a built‑in lock integrated into a door, safe, or piece of luggage. That versatility is why the statement that a combination lock can be a built‑in lock or a padlock is true. It captures the idea that these locks aren’t restricted to a single form. It’s not just portable, since built‑in versions exist. And it isn’t necessarily digital, because many combination locks are mechanical dDial or lever types.

Combination locks come in different forms, so they aren’t limited to one style. A lock that uses a sequence of numbers or symbols can be implemented as a padlock you carry or as a built‑in lock integrated into a door, safe, or piece of luggage. That versatility is why the statement that a combination lock can be a built‑in lock or a padlock is true. It captures the idea that these locks aren’t restricted to a single form.

It’s not just portable, since built‑in versions exist. And it isn’t necessarily digital, because many combination locks are mechanical dDial or lever types.