Which Term Best Describes a Dirty Wound

Which term best describes a dirty wound?

A) Infection rates for these procedures average 4% to 10% and can be improved with specific preventive strategies.
B) An operative procedure or procedures that enters a colonized viscus or cavity of the body but only under elective and controlled circumstances.
C) A wound in which gross contamination is found at the surgical site in the absence of infection.
D) A wound in which an infection is already present when a surgical procedure is performed in the area.