What term describes a clinical trial conducted according to a single protocol but at more than one site?

• A. Multicenter Trial
• B. Investigator
• C. Monitor
• D. Nonclinical Study

Answer: (A)

A multicenter trial describes a clinical study conducted at more than one site under a single protocol. This setup allows broader participant recruitment, more diverse populations, and faster accrual while keeping uniform procedures, endpoints, and data collection across all locations through centralized management and a single protocol.

An investigator is the person at a site responsible for conducting the study. A monitor is the person who checks on study conduct and data quality. A nonclinical study refers to research conducted without human subjects, such as preclinical testing in animals or in vitro systems.