To be able to stop all war!

Mind control or telekinesis

to become rich

Answer B is very captivating, but I would choose C to propose: Time control at will❗ [Spanish Version]: La respuesta B es muy cautivante, pero elegiría C para proponer: ¡Control del tiempo a voluntad❗ ~Si necesitas ayuda con tu español, escríbeme 😃~

This isn't the most glamorous of superpowers, but I think the ability to be in more than one place at the same time would be amazingly useful.