 Which is true about the role of Interstellar in this story?
Interstellar was new and they wanted him on the ship because he was a trained observer. Still, it had an appeal Keith Ellason knew he couldn't deny, a newsman's joy of the clean beat, a planetary system far afield, a closeup view of the universe, history in the making. Interstellar Chief Rexroad knocked the dottle from his pipe in a tray, saying, "Transworld Press is willing to let you have a leave of abscence, if you're interested." Upon the return to Earth a year later, the crew's report of suffering and chaos during the year's outgoing voyage was twisted, distorted and fragmentary. The decision of Interstellar was that the colonists started a revolution far out in space, that it was fanned by the ignorance of Captain Sessions in dealing with such matters. "We have conquered the problem of small groups in space—witness the discovery of Antheon, for example—but when there are large groups, control is more difficult." It ended with passengers engaging in open warfare with each other and the crew. We don't think anything is going to happen, but if it does, we want to get an impersonal, unprejudiced view. Basically, it was an instrument which would open distant vistas to colonization, reducing the shoulder-to-shoulder pressure of a crowded solar system. A gigantic, hollow spike, the ship would never land anywhere, but would circle Antheon as it circled Earth, shuttling its cargo and passengers to the promised land, the new frontier. A space-borne metropolis, it would be the home for three thousand persons outward bound, only the crew on the return trip. To make it easier for you, I suggest you think of this journey strictly from the observer viewpoint. The penetration of space by large groups is the coming out from under the traditions of thousands of years, and as these planet-orginated rules fall away, the floundering group seeks a new control, for they are humanity adrift, rudderless, for whom the stars are no longer bearings but nonexistent things, and values are altered if they are not shown the way. In Ellason's mind the incident, though insignificant from the standpoint of the ship as a whole, could very well be the cause of dissension later on. He said it was significant that all en route had passed stability tests, and that it was to the ship's discredit that someone with criminal tendencies should have been permitted aboard. I'm a horticulturist, and Interstellar asked me to go along.
 They hire the Red Mask as well as a reporter to make it look like they have nothing to hide
 They hire Ellason so that memories of the journey can be documented for the families who are traveling  They hire the Red Mask so that they can make back some of the costs of running the mission  They hire the Red Mask as well as a reporter to make it look like they have nothing to hide  They are the company who hired Ellason in order to get to the bottom of why the missions are going awry