As discussed in class, when calculating required production per period in a make-to- order environment, the production planner should? a) Schedule all orders in the beginning backlog for completion during whatever time period in the planning horizon is one time period before the order due date b) Schedule all orders in the beginning backlog for completion during the first time period in the planning horizon OC) Schedule all orderws in the beginning backlog for completion during whatever time period in the planning horizon is consistent with the order due date d) Schedule all orders in the beginning backlog for completion during whatever time period in the planning horizon is one time period after the order due date e) Schedule all orders in the beginning backlog for completion during the last time period in the planning horizon