According to Robert's Rule of Order, which of the following is one of the four basic ideas of parliamentary law?

One of the fundamental principles of parliamentary law, as established by Robert's Rules of Order, is that there should be one item of business under consideration at any given time. This principle helps to keep meetings organized and ensures that discussions remain focused and productive. By addressing one topic at a time, members can provide their full attention and input, leading to clearer and more effective decision-making.

This approach also facilitates better understanding among members, as it reduces confusion and allows for more thorough examination and debate of each issue before moving on to the next. It promotes order and enhances the overall efficiency of meetings, which is essential for effective governance and management within an organization.

The other options reflect practices and ideas related to parliamentary procedure but do not capture this essential rule regarding the handling of business in meetings.