Evaluate the following statements: What are the two consequences of the above statements?（）
- A Partitions of PURCHASE_ORDER_ITEMS have system-generated names.
- B Both PURCHASE_ORDERS and PURCHASE_ORDER_ITEMS tables are created with four partitions each.
- C Partitions of the PURCHASE_ORDER_ITEMS table exist in the same tablespaces as the partitions of the PURCHASE_ORDERS table.
- D The PURCHASE_ORDER_ITEMS table inherits the partitioning key from the parent table by automatically duplicating the key columns.
- E Partition maintenance operations performed on the PURCHASE_ORDER_ITEMS table are automatically reflected in the PURCHASE_ORDERS table.