What type of security requires something you know and something you have that no one else has?

A) biometric security
B) two factor authentication
C) two part passwords
D) data mining

Two factor authentication requires something that you know (like a password) and something that you have (like a unique security token or a fingerprint) that no one else has. This adds an extra layer of security and makes it much harder for unauthorized users to gain access to sensitive information. Biometric security and two part passwords are also good security measures, but they do not necessarily require something that no one else has (for example, multiple people may have the same fingerprint pattern). Data mining is not a security measure, but rather a process of analyzing large amounts of data to identify patterns and insights.