What is the relationship between 'FedEx' and 'FedEx Express' in the context of the input sentence.
Options: chief executive officer, subsidiary, member of, distribution format

And our FedEx Logistics and FedEx Express operating companies continue to work together to secure air charges for customers in the U.S.  Before I close, I’d like to circle back to Brie’s comments about yesterday’s launch of SenseAware ID and the value our sensor-based technology brings to the healthcare industry.
subsidiary