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The correct choice is the Clinical decision-support system (CDSS) because it is specifically designed to assist healthcare providers in making clinical decisions by analyzing medical data, patient information, and established guidelines. A CDSS can provide alerts, reminders, or clinical guidelines to clinicians, enhancing their ability to make informed decisions that improve patient outcomes and optimize care processes.

In contrast, other systems serve different functions. Computer-assisted instruction (CAI) is primarily focused on educational purposes and does not directly aid in clinical decision-making. Computerized physician order entry (CPOE) helps in the process of entering medication orders and treatment plans efficiently but does not provide the interpretative analysis that a CDSS does. Electronic medical records (EMR) serve as digital versions of patients' paper charts, storing patient data but lacking the analytical capabilities to give decision support directly.