Which is most analogous to the role of GFP in recombinant DNA technology?

A)Using dyes to stain and detect bacteria under light microscopy from the sputum of a patient diagnosed with tuberculosis.
B)Comparing the RFLP patterns of DNA from various suspects to DNA isolated from the scene of a crime using gel electrophoresis.
C)Creating a metagenomic library representing archaea bacteria that thrive in the hot springs of Yellowstone National Park.
D)Monitoring the spread of multi-drug resistant pathogens on a hospital floor by comparing antibiotic susceptibility patterns.