An IS auditor is evaluating networked devices at one of the organization`s branch locations. Which of the following observations should be of GREATEST concern? 

Answer options:

A. Personal devices are required to connect wirelessly to a guest network.
B. A local executive has a wireless-enabled fish tank connected to the corporate network.
C. Company laptops with built-in cameras are observed with opaque tape blocking the cameras.
D. Four personal laptops with default passwords are connected to the corporate network.

D