A unit organizes educators to conduct quality development training. Employees can sign up voluntarily. Lao Zhang meets the new employee Xiao Li and talks about it. Lao Zhang reminds Xiao Li that "the organization organizes quality development training. "Li said," I haven't finished the work at hand, so I don't need to report it. ". Which of the following can be used as a hypothesis in Xiao Li's answer? ['If the work is processed, you must sign up for quality extension training.', "As long as my work is not finished, I don't need to participate in quality extension training.", 'Anyone who has signed up for quality development training has completed the work.', 'Only those who have finished their work can sign up for quality extension training.']