Answer:
B) It increases mRNA stability
Step-by-step explanation:
The polyA tail, which is a sequence of adenine nucleotides added to the 3' end of mRNA during mRNA processing, plays a crucial role in increasing mRNA stability. It helps protect the mRNA molecule from degradation by exonucleases and aids in the transportation of the mRNA from the nucleus to the cytoplasm. This polyA tail is important for the regulation of gene expression and ensuring that the mRNA molecule remains intact for translation by ribosomes in the cytoplasm.