A Triage Nurse in the ER Begins the Assessment of an Elderly

Multiple Choice

A triage nurse in the ER begins the assessment of an elderly patient complaining of bloody diarrhea and severe stomach cramps. The patient has a fever of 104oF as well, and is showing signs of dehydration. IV fluids are administered while further workup of the patient continues.
-Testing is performed on the specimen in the laboratory,including the Gram stain. This test separates bacteria into two broad classes: gram-positive and gram-negative. Which step in the staining process is the differential step,for it only acts upon one type of cell?

A) Addition of Gram's iodine (mordant)
B) Addition of crystal violet
C) Decolorization with alcohol
D) Addition of safranin (counterstain)