Which entity is abbreviated as CDA in relation to airports?

The abbreviation CDA stands for the Chicago Department of Aviation. This entity is responsible for the administration and operation of O'Hare International Airport as well as Midway International Airport, both located in Chicago. The Chicago Department of Aviation oversees airport management, ensures compliance with aviation regulations, and works on development projects to enhance airport facilities. Understanding the role of the CDA is crucial for anyone involved with airport operations and regulations, as they are the governing body that implements policies, promotes safety and security, and manages airport services.

The other options do not represent any commonly recognized organization linked to airports, making the Chicago Department of Aviation the accurate and relevant choice. Knowing the proper agency helps identify where to find information regarding airport regulations, operations, and infrastructure development in the Chicago area.