Who among the following holds the record for being the oldest woman astronaut?
[A]Barbara Morgan
[B]Sally Ride
[C]Pamela Melroy
[D]Marianne Merchez

Barbara Morgan
Barbara Morgan, the American teacher and former NASA astronaut had made history in August 2007 when, at 55, she became the oldest woman astronaut. On board space shuttle mission STS- 118 to the International Space Station, flown by the orbiter Endeavour, Morgan served as robotic arm operator and transfer coordinator, coordinating the transfer of over 2,300 kg of cargo to the International Space Station, and bringing home over 1,400 kg.