Which comment MOST FULLY represents a clear understanding of this passage? A) It seems that astronauts on this mission really enjoy each other's company and are actually close friends. B) It is obvious that before any mission, there is much planning for the emotional and physical well being of astronauts. C) Any individual who wishes to be an astronaut must realize that little to no contact with family members is an unpleasant necessity. D) Clearly, the workers at the Mission Control Center in Houston, Texas have lived and worked on previous International Space Stations.