A Master Service Agreement (MSA) establishes the general terms and conditions for ongoing business engagements. This allows companies to reuse the same terms across 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 on service performance expectations, not overall contract terms.