Which city is home to the busiest cargo airport in North America?

Here is the question :

WHICH CITY IS HOME TO THE BUSIEST CARGO AIRPORT IN NORTH AMERICA?

Here is the option for the question :

Baltimore, Maryland
Portland, Oregon
Memphis, Tennessee
Houston, Texas

The Answer:

And, the answer for the the question is :

Memphis, Tennessee

Explanation:

[STC0017865]. Memphis International Airport is the busiest airport for cargo in North America since it serves as the headquarters for FedEx. At Memphis International, FedEx has 11,000 employees, rents 34 million square feet of airport space, and runs about 400 flights daily.