The question is, Company A agrees to provide perimeter protection, power and environmental support with measurable goals for Company B, but will not

The question is, Company A agrees to provide perimeter protection, power and environmental support with measurable goals for Company B, but will not be responsible for user authentication or patching of operating systems within the perimeter. Which of the following is being described? Please provide the correct answer along with an explanation.

A. Service Level Agreement

B. Memorandum of Understanding

C. Business partner Agreement

D. Interoperability Agreement