A Nurse Would Question Which of the Following Orders

A nurse would question which of the following orders?

A) Administer potassium chloride 20 mEq, by mouth, once.
B) Infuse potassium chloride 40 mEq, IV push over one minute, once.
C) Administer potassium chloride, 20 mEq diluted in 90 mL juice, by mouth once.
D) Infuse potassium chloride 40 mEq in 250 mL NaCl, over four hours, once.