Please explain how you got this answer

BALESPERSON OFFICE PK Office Number PK Salesperson Number No Salesperson Works in Telephone Size 0+ %+ Occupled by Salesperson Name Commission Percentage Year of Hire No Salesperson What is the modality measuring? The maximum number of salesperson numbers per office numbers The maximum number of salespersons working in an office The minimum number of salesperson numbers per office numbers The minimum number of salespersons working in an office