20. MicroRNA (miRNA) degrades mRNA by binding to its complementary target sequence in the 3'UTR. Which one of the following experimental approaches will NOT lead to up-regulation of mRNA levels? (A) Depletion of the particular miRNA. (B) Deletion of the complementary target site from 3'UTR (C) Overexpression of miRNA (D) Disruption of miRNA processing complex