Answer:
All of the above
Explanation:
Post-transcriptional control is that which is carried out after the transcription process, i.e. on the RNAm.
Among them you can find them:
control of RNA splicing: process by which the introns of the RNA sequence are eliminated.
control of RNA shuttling: maintenance process and transport of RNA to the cytoplasm
control of RNA stability: modifications on the extremes 5´ (Capping) and 3´ (poli A Tail)