A Phlebotomy Supervisor Discovers That a Phlebotomist Is Not Adding

Multiple Choice

A phlebotomy supervisor discovers that a phlebotomist is not adding the prescribed number of milliliters of patient sample to each blood culture collection tube, but is instead just adding patient sample to the tube until it "looks red." What kind of variable(s) is(are) caused by this action?

A) Preexamination and examination
B) Postexamination
C) Preexamination
D) Examination and postexamination