The following conclusions are based on the 1998 Xidanfeizhou Commercial Building various functional departments received by the employee reimbursement documents combined.After this is made to the consolidated statistics, some functional departments have received the reimbursement documents submitted by the employees.
Which of the following options cannot be overturned by the fact that reimbursement documents cannot be returned?
At least four employees of the accounting department paid reimbursement documents and reimbursed at least 2,500 yuan