Today implementation of fast, accurate reliable and user-acceptable biometric identification systems is already taking place. Unique physical attributes or behavior of a person are used for that purpose.
From: TIPTON, Harold F. & KRAUSE, MICKI, Information Security Management
Handbook, 4th Edition, Volume 1, Page 7

The Full Backup Method makes a complete backup of every file on the server every time it is run. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 69.

B1 is also called "Labeled Security" and each data object must have a classification
label and each subject a clearence label. On each access attempt, the classification and clearence
are checked to verify that the access is permissable.
C2 is incorrect. C2 is also called "Controlled Access Protection" and only requires that subjects be
individually identified and that security-related events are auditable.
B2 is incorrect. B2 is also called "Structured Protection" and imposes additional controls on
security policy and a more thorough review of system design and implementation.
B3 is incorrect. B3 is also called "Security Domains" and and imposes more granularity in each
protection mechanism.
References:
CBK, pp. 329 - 330
AIO3 pp.302 - 307

Explanation/Reference:
Explanation:
A chosen-ciphertext attack is one in which a cryptanalyst may choose a piece of ciphertext and attempt to obtain the corresponding decrypted plaintext. This type of attack is generally most applicable to public-key cryptosystems.
Incorrect Answers:
B: A Ciphertext-Only attack is one which the cryptanalyst obtains a sample of ciphertext without the plaintext associated with it. This data is relatively easy to obtain in many scenarios, but a successful ciphertext-only attack is generally difficult and requires a very large ciphertext sample. This attack is not generally most applicable to public-key cryptosystems.
C: Plaintext Only Attack it not a defined attack type.
D: An Adaptive-Chosen-Plaintext attack is a special case of chosen-plaintext attack in which the cryptanalyst is able to choose plaintext samples dynamically and alter his or her choices based on the results of previous encryptions. This attack is not generally most applicable to public-key cryptosystems.