Which of the following is the basis for apportioning rent among departments?

The basis for apportioning rent among departments is typically the floor area occupied by each department. This is because rent is typically charged based on the amount of space a department occupies. Floor area is a fair and objective basis for apportioning rent, as each department can be assigned a specific space or area. The rent can then be apportioned based on the proportion of the total floor area occupied by each department. While other factors such as sales, number of employees, and direct labor cost could be used for apportioning other overhead costs, they are not appropriate for apportioning rent because they do not relate directly to the use of space. Therefore, floor area is the most appropriate basis for apportioning rent among departments.