Respuesta :
D: the region that codes for RNA has been removed
After the RNA is transcribed, it undergoes RNA splicing. RNA splicing is a process that involves removal of introns, regions that often contain RNA transcript or non-coding regions, leaving only the exons, regions that code for protein, in a transcript.
A chromosome can regulate transcription and decrease it through the region that codes for RNA has been removed. So the answer is letter D. RNA is also claled as ribonucleic acid in which it contains the amino acids that helps in coding the genes of our body.