AMaster Service Agreement (MSA)establishesthe general terms and conditionsfor ongoing business engagements. This allows companies toreuse the same termsacross multiple contracts, revisiting them periodically for updates. NDA (B)protects confidential information but does not define service terms. MOU (C)is a non-binding agreement, often used for partnerships, not formal service contracts. SLA (D)focuses onservice performance expectations, not overall contract terms. Reference:CompTIA Security+ SY0-701 Official Study Guide, Security Program Management and Oversight domain.