Explanation
Administrative - labeling of sensitive data
Technical - Constrained user interface
Logical - Biometrics for authentication
Physical - Radio Frequency Identification 9RFID) badge

The following answers were NOT correct:
Candidate Key: A candidate key is a combination of attributes that can be uniquely used to identify
a database record without any extraneous data. Each table may have one or more candidate
keys. One of these candidate keys is selected as the table primary key.
Foreign Key: A foreign key is a field in a relational table that matches the primary key column of
another table. The foreign key can be used to cross-reference tables.
Secondary key: The term secondary key is a key that is used strictly for data-retrieval purposes. A
secondary key is sometimes defined as a "data item value that identifies a set of records." It is
important to note that a secondary key does not need to have unique values in a table; in this
respect, secondary keys differ from primary keys (and candidate keys and superkeys).
References:
A candidate key is an attribute that is a unique identifier within a given table.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten
Domains of Computer Security, 2001, John Wiley & Sons, Page 45.
Candidate Key Ref: http://databases.about.com/cs/specificproducts/g/candidate.htm
Feedback from Jerry: A candidate key is one of several alternative columns in a table that may be
chosen as a primary key. The PRIMARY KEY IS the unique identifier. The foundation of a
relational database is the establishiment and reliance on a unique primary key, not candidate
keys. Primary key is a more correct answer to this question than candidate key.
Secondary key ref: http://www.gslis.utexas.edu/~wyllys/DMPAMaterials/keys.html

Explanation/Reference:
Explanation:
The Contingency Planning Coordinator is not responsible to distribute the contingency plan to all employees.
Incorrect Answers:
A: Once a continuity plan is developed, it actually has to be put into action. The people who are assigned specific tasks need to be taught and informed how to fulfill those tasks, and dry runs must be done to walk people through different situations. The drills should take place at least once a year, and the entire program should be continually updated and improved.
C: Version control is critical. A strict version control of the IT contingency should be kept.
D: There should be two or three copies of these plans. One copy may be at the primary location, but the other copies should be at other locations in case the primary facility is destroyed.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 951