Answer:
b. They can send in comment letters to the NTSB.
Explanation:
The opportunities that airlines and parents will have for input on the proposed rule is that they can send in comment letters to the NTSB.
The National Transportation Safety Board (NTSB) is an independent U.S. government investigative agency responsible for civil transportation accident investigation.
An almost unknown responsibility of the NTSB is that it serves as a court of appeals and employs administrative law judges which initially hear all appeals, and the administrative law judge's ruling may be appealed to the five-member Board