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.