The Most Important Reason That the Phlebotomist's Tray Should Not

The most important reason that the phlebotomist's tray should not be carried into the room of a patient in isolation is:

A) surfaces on the tray may act as a reservoir for infectious agents.
B) there is often no spare space available in an isolation room.
C) the tray should be left in the hallway so others may find the phlebotomist when needed.
D) supplies may be stolen from the tray.