Final answer:
The investigation of Spanair Flight 5022 primarily involved the Spanish accident investigation authority, CIAIAC, with participation from organizations like the NTSB.
Step-by-step explanation:
The investigation party of Spanair Flight 5022 accident included members from the National Transportation Safety Board (NTSB), which is an American organization that investigates civil transportation accidents. While the Federal Aviation Administration (FAA) could be involved in providing technical expertise or other assistance, and the International Civil Aviation Organization (ICAO) may participate or follow the investigation due to its international nature, the primary body responsible for the investigation into Spanair Flight 5022 was the Comisión de Investigación de Accidentes e Incidentes de Aviación Civil (CIAIAC) from Spain. Hence, the correct answer is those organizations closely related to the country of the airline's origin and the location of the crash.