How did NASA help to distinguish genetic factors from environmental ones when studying the effects of living space?(1 point)
By running experiments on astronauts that were in space for over a year.
By running experiments on astronauts that were in space for over a year.
By observing changes in retired astronauts over a period of ten years.
By observing changes in retired astronauts over a period of ten years.
By introducing animals and other organisms that could be studied in space.
By introducing animals and other organisms that could be studied in space.
By analyzing changes in one twin on Earth and the other in space.
By analyzing changes in one twin on Earth and the other in space.