Are astronauts in orbit weightless? explain your answer.

Weight is the same as mass. and the mass of a person depends on the gravity.
while in orbit depending if the astronaut is outside of earth orbit or in the earth orbit and different atmosphere an astronaut's weight differs

Earth-orbiting astronauts are weightless like riders of a free-falling amusement park ride or how a free-falling elevator are weightless. They're weightless because there is no external contact force pushing or pulling upon their body. So gravity is the only force acting upon their body.
Hope this helps! :)

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.

There's no options to. choose from