9...Using the assembly-line balancing procedures for any assembly-line balancing problem, which of the following is most correct?

• The theoretical minimum number of workstations is sometimes more than number of workstations actually used.
• The theoretical minimum number of workstations is sometimes less thanYand sometimes more than number of workstations actually used.
• The theoretical minimum number of workstations is always less than number of workstations actually used.
• The theoretical minimum number of workstations is never less than number of workstations actually used.
• The theoretical minimum number of workstations is always less than or equal to number of workstations actually used.