Final answer:
The best document to document the engagement of two companies sharing threat intelligence is a Memorandum of Understanding (MOU), as it outlines terms and expectations without creating a legal commitment. so, option B is the correct answer.
Step-by-step explanation:
The question asks which business document would be best to document the engagement between two companies wishing to share threat intelligence. Among the options provided, the most suitable document for this purpose is a Memorandum of Understanding (MOU). An MOU is a formal document that outlines the terms and details of an agreement, which in this case would cover the sharing of threat intelligence between the two companies. It establishes the expectations and responsibilities of both parties without requiring a legal commitment.
A Business Partnership Agreement is generally more comprehensive and is used when forming a new business entity together, a Service-Level Agreement (SLA) is typically used to define the level of service expected by a customer from a service provider, and an Interconnection Security Agreement (ISA) deals specifically with the security requirements for connecting two or more IT systems.