(1) dr. edward lu and coast guard lieutenant commander daniel burbank—two astronauts who build the international space station—discussed the excitement and the day-to-day routine of life in orbit. (2) "space really is the most hostile environment humans have ever tried to live in," said burbank. (3) "you depend on the station and the people on the ground for everything you need to survive. (4) it is complicated and everything has to work! " (5) it's a risky adventure with very little margin for error, but, said the astronauts, the thrill of being there is something that neither would give up.

in which word or words in the paragraph above is there a capitalization error?
a.
international space station
b.
lieutenant commander
c.
astronauts
d.
coast guard