Which statement best reflects the expected time frame for conducting and completing the trial?

• A. The investigator should have adequate time to begin the trial but completion timing is not important.
• B. The investigator should have sufficient time to properly conduct and complete the trial within the agreed trial period.
• C. Time for trial conduct is determined solely by the sponsor.
• D. Time is the sponsor's sole responsibility.

Answer: (B)

The essential idea is that the trial must have a realistic and sufficient time frame so the investigator can conduct the study properly and complete it within the agreed period. In GCP, the investigator is responsible for carrying out the trial according to the protocol and regulatory requirements, which includes meeting timelines for participant visits, data collection, safety reporting, and study closeout; the trial timeline is specified in the agreement between sponsor and investigator and must be feasible given available resources. If the time provided is inadequate, activities may be rushed or incomplete, compromising data quality and participant safety. The other options imply that timing is unimportant, or dictated solely by the sponsor, which undermines the investigator’s obligation to ensure proper conduct and completion within an agreed schedule.