Explanation: C-Map charts are proprietary commercial products, and their use is governed by strict licensing agreements. To ensure legal operation and copyright compliance, each installation of the C-Map software and charts on a specific computer generally requires individual license activation. This involves entering unique license information for that particular installation, allowing the system to verify authorized use and access to features and updates. This common software licensing practice prevents unauthorized copying and ensures that only legitimate users operate the licensed charts. Options A and C describe specific implementation details (master terminal or dongle) that might apply to some systems but are not the universal requirement for enabling charts on *each* computer. Option B describes how charts might be acquired, not the procedure for activating them for use.