I had two choices. (1) Go down to the surface alone, leaving the humans here, where the Targets could return or some unknown factor could randomly appear and kill them and then Mensah and Arada would never speak to me again, which might not be a factor if I never got off the planet. (2) Take the humans with me, where I could get them killed and/or die with them. (3) Sit here until the explorer destroyed/captured ART and returned, or ART destroyed/captured the explorer and returned, in which case I would still need to go to the surface anyway, possibly with even more humans trying to butt in and come with me so they could get killed, too. Three, that was three choices.