While commercial volumes were down significantly due to business closures across the globe, we experienced a surge in residential deliveries at FedEx Ground and in transpacific, and charter flights at FedEx Express, which required incremental cost to serve.
Utilize the input text as a context reference, choose the right relationship between 'FedEx' and 'FedEx Ground' from the options.
Options: director/manager, subsidiary, parent organization, legal form