Water is delivered to ice-cube trays that are placed in freezers at less than -6° centigrade. The trays are removed from the freezers after six hours. If the water has not completely frozen, the trays are returned to the freezer until freezing is complete. The ice-cubes are then removed from the trays, inspected, and placed in bags. Defective cubes are discarded. The bags filled with cubes are kept in storage freezers. Alarms are sounded if a freezer's temperature goes above -6 centigrade. It has been shown that water in the ice-cube trays will freeze in six hours at -6'"' centigrade or less. Which of the following correctly depicts the flowchart for the process?
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