The correct answer is International Space Station (ISS).
MIR was a Russian space station that was operative in low Earth orbit from 1986 to 2001. At that time, it was the largest satellite and it was the first research station on space in orbit to be continuously inhabited by humans. Its record of the longest continous human presence was of 3,644 days, and it was surpassed by the ISS on 23 October 2010.
