In an online shopping application, the primary case type PurchaseOrder has two child case types: Payment and Packaging. In processing PurchaseOrder case PO-11, Payment case Pay-37 and Packaging case Pac-56 are created. Which statement about the processing of PO-11, Pay-37, and Pac-56 is correct?
A. PO-11 has to be resolved before either Pay-37 and Pac-56 is resolved.
B. Pac-56 has to be resolved before Pay-37 is resolved.
C. Both Pay-37 and Pac-56 have to be resolved before PO-11 can be resolved.
D. PO-11 can be resolved when either Pay-37 or Pac-56 is resolved.