An Hfr Microbial Strain Would Best Be Described As

Multiple Choice

An Hfr microbial strain would best be described as:

A) any bacterium that readily takes up naked DNA through its membrane.
B) a bacterial strain with specific auxotrophic characteristics.
C) a bacterium containing a chromosomally integrated plasmid conferring mating competency.
D) a bacterium carrying an Hfr phage with membrane fusion competency.
E) a bacterium that lacks the histidine frequenase gene.