What basic assumption underlies the $"$ Model $-$ View $-$ Controller $"?$ Select one :a$)$Program code $,$ illustrations of the program code $,$ and modifications of the code should be handled separately $.$b$)$Sequence diagrams $,$ illustrations of the diagrams $,$ and errors in the program code should be handled separately $.$c$)$Data $,$ visualization $,$ and user input should be handled separately $.$ Data $,$d$)$sketches of the user i