When making contact with the outside surfaces of the ISS astronauts usually place their toes under a foothold or handhold bar. Why is this procedure necessary?
A To protect astronauts from stray particles in space.
B To reduce the frictional forces acting on the astronauts.
C To prevent astronauts from damaging the surface of the ISS.
D To keep the astronauts from being affected by a reaction force from the ISS. ​