Illuminas,a Research Firm in Moscow,maintains a High Level of Security

Multiple Choice

Illuminas,a research firm in Moscow,maintains a high level of security due to the sensitive research data that they handle.Certain parts of the facility have restricted access and are accessible only to authorized personnel.To validate the identity of such personnel,the firm uses a certain technology which scans employees' irises before granting them entry to such areas.This is an example of which of the following aspects of personal identification?

A) What you do
B) What you know
C) What you have
D) Who you are