The Gene That Codes for the Bacterial 16s RNA Molecule

The gene that codes for the bacterial 16s RNA molecule is highly conserved across species, but also contains hypervariable regions that are highly species-specific.FISH analysis of rRNA is beneficial because

A) it can narrow down the list of potential infectious organisms to three or four.
B) it is much cheaper than traditional analytical methods.
C) it can precisely identify the 16s sequences from patient samples without the lag time it takes to culture the organism.
D) it incorporates both direct testing and serological testing for added accuracy.