How was luciferase (LUC) with an artificial stop codon used as a control in the experiments involving altered tRNA?

A. Diminished LUC expression demonstrated that the altered tRNA could properly recognize stop codons.

B. LUC expression demonstrated that the gene was being induced by Lys.

C. LUC expression demonstrated that Lys was being substituted for the stop codon by the altered tRNA.

D. The artificial LUC is an example of a synthetic gene.

Answer: Option C