A kanban card is used to signal that Work is ready to be moved to the next.
The Kanban system or process is based on product signals throughout its production process from start to finish.
When a "customer service center" removes something from the store, a "kanban" or signal goes with the equipment. So this is a "pull" system that is driven by need.
Thus, A kanban card is used to signal that Work is ready to be moved to the next. Option D is correct statement.
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