Which of these variables related to the collection of blood may falsely increase the plasma potassium level, if the potassium sample is collected using a green-top tube?

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Please select the single best answer

	Drawing a purple-top EDTA tube prior to the green-top tube
	Shaking the blood collection tube to mix the blood with anticoagulant
	Collecting a blood sample for potassium testing above an IV site
	ALL of the above actions can falsely increase the potassium level