A client has a prescription for the insertion of a nasogastric tube to low intermittent suction. When inserting the nasogastric tube, the nurse observes an immediate return of "coffee ground" drainage. Which action should the nurse implement?

A. Connecting the nasogastric tube to high continuous suction without further assessment or intervention is not appropriate and could exacerbate the situation. B. Clamping the nasogastric tube and contacting the healthcare provider is the correct action. "Coffee ground" drainage can indicate the presence of blood in the stomach, which may require further evaluation and intervention by the healthcare provider. C. Connecting the nasogastric tube to suction as prescribed without addressing the presence of "coffee ground" drainage is not appropriate. It's important to assess the significance of this finding before proceeding with suctioning. D. Immediately removing and then reinserting the nasogastric tube may not be necessary and could increase the risk of trauma or complications. It's important to assess the situation further and involve the healthcare provider in decision-making.