I think the correct answer is D
Restrain i know this for sure
All three bacterial species are gram negative. Gram negative bacteria tend to survive better in Internal cavities of the body as they do not have thick cell walls like gram positive bacteria, so tend to "dry out" in dryer conditions like on the skin.
<span>So I would say the urinary tract provides them with a "good" living environment to thrieve and cause infection. They are all opportunistic pathogens. They are also all found naturally in nature in soil and plant roots so maybe this has something to do with it? </span>
