Information: - AREX(Airport Railroad Express), spelled "A'REX" as a brand name, is a South Korean commuter rail line that links Seoul with Gimpo Airport and Incheon International Airport. The section between the two airports opened on March 23, 2007, the extension to Seoul Station opened December 29, 2010. - Incheon International Airport Cargo Terminal Station is a railway station on AREX . - Incheon International Airport (IIA) (sometimes referred to as SeoulIncheon International Airport) is the largest airport in South Korea, the primary airport serving the Seoul Capital Area, and one of the largest and busiest airports in the world. Since 2005, it has been rated the best airport worldwide by Airports Council International every year. It is also rated as the world's cleanest airport and the world's best international transit airport by Skytrax. After reading the paragraphs above, choose the best answer for the entity that related to 'incheon international airport cargo terminal station' with the relationship of 'date of official opening'. Choices: - 2005 - 2007
2007