Which statement about nondestructive testing is true?

Which statement about nondestructive testing is true?

• A. Nondestructive testing requires a part to be permanently removed from service.
• B. Nondestructive testing can only be performed on metal parts.
• C. Nondestructive testing does not require removal from service.
• D. Nondestructive testing always damages the part.

Answer: (C)