In Which of the Following Situations Is the Sterile Field

Multiple Choice

In which of the following situations is the sterile field disrupted?

A) The assistant drops additional sterile gauze in the center of the field.
B) A contaminated instrument is handed to the assistant away from the field.
C) The surgeon reaches behind his/her body to grab more sterile gauze.
D) The surgeons holds all instruments upright when handling them.