What is the purpose of using Gantt charts? Select a Choice Below current question choices OptionA They allow the supply chain managers to make sure all pieces of the product are available by the time the actual production process begins. OptionB They are used to organize activities in the most efficient sequence by identifying a critical path. OptionC They are essentially used by supply chain managers to identify the root causes for a problem or effect in the manufacturing process. OptionD They are used in complex processes that are interrelated for identifying those events which trigger an actual change in the manufacturing process