A Black Colony on HE and XLD Agars, Isolated from a Stool

Multiple Choice

A black colony on HE and XLD agars, isolated from a stool culture, produces the following biochemical reactions:
$\begin{array}{ll} \text {Motility at \( 25^{\circ} \mathrm{C} \) : positive}& \text {PAD: no color change}\\ \text {Motility at \( 35^{\circ} \mathrm{C} \) : positive}& \text {Indole: no color change}\\ \text {Urea: no color change}&\text {VP: no color change}\\ \end{array}$

If this organism is a strict pathogen, you expect it to also be

A) citrate positive and lysine positive
B) citrate negative and lysine positive.
C) citrate positive and lysine negative.
D) citrate negative and lysine negative.