External consistency ensures that the data stored in the database is: 

Answer options:

A. in-consistent with the real world.
B. remains consistant when sent from one system to another.
C. consistent with the logical world.
D. consistent with the real world.

D

External consistency ensures that the data stored in the database is consistent with the real world. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, page 33.