Which Is a True Statement About the Administration of Potassium

Which is a true statement about the administration of potassium?

A) The intravenous rate should not exceed 30 mmol/hr.
B) Oral forms should be given on an empty stomach to maximize absorption.
C) The concentration of potassium in intravenous solutions should not exceed 60 mmol/L.
D) When given intravenously, potassium must always be given in diluted form.