A work order has been created to perform corrective maintenance on a defective generator. All required information has been provided in the work order, but required materials are not in stock and  have to be ordered. <br /> What is the status of the work order, after a maintenance manager has approved the work order? ()
A、 Approved (APPR)
B、 Waiting on Materials (WMATL)
C、 Waiting to be Scheduled (WSCH)
D、 Waiting on Plant Condition (WPCOND)