A
it can blast enemys away like B but more versatile, C is not useful early on unless shinji caught his enemy off guard, in which case he could defeat said enemy by putting kunai in their body.
A, it says it has many variations of the jutsu. With the help of Yamato and the book of the second hokage Shinji should be able to use many variations. It is also the one that has the most variety.
Thanks for the chapter ! maybe in the future, if he somehow decides to dive in the principle of elements he could develop a ❄ release kekkei genkai since he has water and wind affinity
B- He doesn’t have any damage dealing jutsu currently , and it seems easier to learn, plus it’s easier to use in battle. While the other two would require more experience to use effectively.
A pois tem variacoes e utilizações diferentes ou aprenda todos e tente montar conbinacoes, ele poderia descobrir o eletilo gelo tentando conbinar os elementos.