Which of the following assumptions, if made by the penetration-testing team, is MOST likely to be valid?

A company hired a penetration-testing team to review the cyber-physical systems in a manufacturing plant. The team immediately discovered the supervisory systems and PLCs are both connected to the company intranet.

Which of the following assumptions, if made by the penetration-testing team, is MOST likely to be valid?
A . PLCs will not act upon commands injected over the network.
B . Supervisors and controllers are on a separate virtual network by default.
C . Controllers will not validate the origin of commands.
D . Supervisory systems will detect a malicious injection of code/commands.

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Answer: C