Reliability in data collection is best ensured by which of the following?

Reliability in data collection is best ensured by which of the following?

• A. Relying on a single interview when the patient feels well.
• B. Recording data only if it confirms initial impression.
• C. Using subjective impressions as the sole data source.
• D. Cross-verifying with multiple sources, ensuring consistency over time, and using accurate measurements.

Answer: (D)