Final answer:
The priority nursing action for nonreassuring or ominous signs is to start an intravenous line with normal saline.
Step-by-step explanation:
The priority nursing action for nonreassuring or ominous signs is to start an intravenous line with normal saline (option a).
Normal saline is a solution of 0.9% sodium chloride in water. It is isotonic, meaning it has the same concentration of dissolved particles as the blood. It is commonly used for fluid resuscitation and to restore and maintain fluid balance.
Other options like dextrose solution (option b), blood transfusion (option c), and potassium chloride (option d) may be used in specific cases depending on the patient's condition, but normal saline is generally the first-line choice.