Final answer:
The best method to ensure employees are aware of cyber security threats is through Regular user education, which involves training and simulations to help them recognize and report threats.
Step-by-step explanation:
To ensure that the latest cyber security threats are known to the employees across an enterprise, the best approach is D. Regular user education. This method involves an ongoing program to train employees in recognizing, avoiding, and reporting potential threats such as phishing emails, suspicious links, and other methods used by cybercriminals. Examples include interactive training sessions, simulations like sending fake phishing emails, and providing updates on new threats.
These practices help in creating a vigilant workforce that can act as the first line of defense against cyber threats. While options like Message of the Day, Email lists, and Company forums can be helpful in disseminating information, they are most effective when used as part of a comprehensive cyber security education program.