By the time they finished scouring the mission board, they had picked out three Grade E missions and four Grade D missions.
The Grade E missions mainly consisted of scouting assignments in areas outside the base, places that the base's warriors hadn't been able to check recently, especially with most of Kisha's people tied up in training. Kisha herself was running out of time, as her S-Class mission, "Commander of a Thousand II," was nearing its deadline.
The warriors were all tied up with training, leaving them short on manpower for external scouting. This routine mission was essential to monitor zombie activity around the base, to track the zombies' movements, prevent a nearby horde from evolving into a full-scale zombie wave, or detect the presence of any mutated zombies preparing to gather more zombies and attack.