What is one condition under which participants are allowed to finish their survey?

Participants are allowed to finish their survey if the survey is paused. This allows them to return and complete the survey at a later time, ensuring that they don't lose their progress and can provide more thoughtful responses without the pressure of completing it in one sitting. The ability to pause gives participants flexibility and can improve the quality of the data collected, as they can take time to reflect on their answers before submitting them.

The other conditions do not universally guarantee that participants can finish the survey. For example, completing during business hours may not apply to all surveys and doesn't consider participant availability. A submission window exceeding 24 hours does not directly correlate with allowing participants to finish, as the opportunity to pause is a more effective tool. Being logged in may help with data integrity and progress tracking, but it is not a requisite condition for finishing a survey.