a) Christina Koch
b) Anne McClain
c) Sunita Williams
d) Serena Auñón-Chancellor
National Aeronautics and Space Administration (NASA) announced that astronaut Christina Koch is going to have her mission on the International Space Station (ISS) extended to 328 days. She would set a new record for the longest single spaceflight by a woman, breaking the old one of 288 days set by retired astronaut Peggy Whitson in 2016-17.