Why Are Molecular Methods Particularly Useful for Identification of Microbes

Multiple Choice

Why are molecular methods particularly useful for identification of microbes when they are difficult to grow?

A) While all microbes can (and should) be grown for identification purposes,sometimes it's simply faster to use a molecular technique.
B) They AREN'T useful-growing a microbe is clearly the only way to properly identify it.
C) Since all microbes use DNA,and we can sometimes detect and identify them through even very small amounts of their DNA,molecular methods allow us to identify microbes even when they can't be grown at all.
D) Molecular methods are far cheaper methods than growing microbes for identification.