Which AES key length is explicitly cited as offered in the material?

• A. 112 bits
• B. 192 bits
• C. 256 bits
• D. 128 bits

Answer: (B)

Key lengths in AES are fixed options, and a lot of study materials will specify one length as the example or required choice. The material in question explicitly cites the middle of the standard AES sizes as being offered. That means the document is pointing to a particular, mid-length option as the one provided or supported, which is why it’s the correct pick in this context. The other standard sizes exist, but they aren’t the ones singled out by the material here, and anything outside the AES standard sizes isn’t a valid option.