Chicago ceramic center makes several lines of ceramic vases using a process that involves forming, drying, firing, and glazing. The 5 workers each take on average 60 minutes to form a vase. The vases will then be loaded into an oven to dry. The oven can hold up to 200 pieces and it takes 5 minutes to load each vase. Once all the vases are loaded into the oven, it takes 25 hours to dry each load. The dried vases are then placed in a kiln that holds up to 200 pieces. It takes 6 minutes to load each vase and the vases will be fired in the kiln for 72 hours. After firing, 4 workers each takes an average of 2 hours to glaze each vase. Chicago ceramic sells each vase that is made. What is the ideal batch size to minimize inventory while allowing the process to produce at maximum flow rate? A. 180 B. 60 C. 240 D. 120