Indicate the order in which the following steps occur in the production of a mature mRNA.
A)initiation of transcription,splicing,addition of 5´ cap,addition of poly(A)tail,transport to cytoplasm B)initiation of transcription,addition of 5´ cap,splicing,addition of poly(A)tail,transport to cytoplasm C)initiation of transcription,addition of poly(A)tail,addition of 5´ cap,splicing,transport to cytoplasm D)initiation of transcription,addition of 5´ cap,addition of poly(A)tail,splicing,transport to cytoplasm