Final answer:
A copy of a business continuity plan must be made available upon request by regulators. This is to ensure that the organization maintains compliance with applicable laws and industry standards. Option C is correct.
Step-by-step explanation:
The question pertains to the timing of when a copy of a business continuity plan must be made available. A business continuity plan is a strategic outline that an organization creates to ensure its critical operations continue during and after a disaster or disruptive event. According to best practices and regulatory requirements, the correct answer is C) Upon request by regulators.
Organizations may be required to produce a copy of their business continuity plan upon the request of regulators to ensure compliance with relevant laws and industry standards. Additionally, while plans should be maintained and updated regularly, there is no specified frequency, such as annually or biannually, for providing it to regulators outside of such requests.
However, it's important for businesses to note that in the event of a business interruption, having the plan at hand is crucial for effective response and recovery.