MessyLife
B because it makes Shinji more ambitious and as the author already hinted at trait evolution this choice gives us the opportunity to evolve our best trait yet Crazily Ambitious, the trait that allows us to keep up with and even surpass the geniuses of the Naruto world despite us being the very definition of average. P.S Holy Joker approves
A I dont want to brew shinji into a unfeeling machine or anything but it is sort of the best option here While I'd love to pick Sadness because it would probably be good for him to have some reaction the truth is. shinji has always been aware if what being a ninja entails and weather or not he actually prepared himself it doesnt matter this is how shinji has always thought if you think out it. by all regards . plus shinji is merciless to those who are enemies of himself and in this situation where kota could die if we arent clear headed shinji really doesnt have time to be weighed down by feelings. so sure while I'm choosing this for shinji and kota with how shinji has developed through this quest to this point. A is over all the best choice for the future. not perfect but the best short term possibly long term if we had the choice I'd have shinji vist a yamanaka just to help assure him that it is okay to feel indifferent because that might freak him out a little once his adrenaline has calmed down . this is affecting shinji long term. it will be a trait A will cause some problems but not as many as the others would long term