Integration testing involves:

• A. Testing by combining software modules to test as a group.
• B. Testing to determine the effectiveness of the workflow design.
• C. Testing the flow of data across all interfaces.
• D. Testing that is done by all disciplines charting on the same practice patient.

Answer: (C)

Integration testing focuses on how data moves between modules and across interfaces. After individual components are tested, this level checks that when one part produces data, another part receives it correctly, with proper formats, mappings, and timing, across all interfaces. This is especially important in healthcare IT where EHRs, lab systems, pharmacies, and other systems exchange information; the goal is to verify end-to-end data flow and interface behavior, not just that components work in isolation or that a workflow design looks effective. So testing the flow of data across all interfaces best captures what integration testing is about.