An IP provided an inservice to HCWs concerning risks to tuberculosis transmission. A week later, the ICP notices a nurse who was among those recently taught, propping the door open to a negative pressure room. How should the ICP address this problem?

A) check attendance records to verify this nurse's attendance at the recent in service
B) report this to the unit head nurse and instruct her to handle the situation
C) schedule another in service
D) provide one on one education emphasizing each employee's role in preventing HAIs