Answer :
C. Mix the cDNA with the liver DNA.
After locating all of the mRNA produced by the liver and produced by the cDNA, the scientist should MIX THE cDNA WITH THE LIVER DNA to artificially produce a protein that is produced in the liver of the frogs.
After locating all of the mRNA produced by the liver and produced by the cDNA, the scientist should MIX THE cDNA WITH THE LIVER DNA to artificially produce a protein that is produced in the liver of the frogs.