An older adult client is admitted with the medical diagnosis of possible cerebral vascular accident (CVA). The client has facial paralysis and cannot move the left side of the body. When entering the room, the nurse finds the client's spouse tearful and trying unsuccessfully to give the client a drink of water. Which action should the nurse take?

A. Assisting with giving sips of water could pose a choking risk if the client's swallowing ability is impaired. B. Using a straw could increase the risk of aspiration for a client with swallowing difficulties. C. Obtaining thickening powder might be necessary, but first the nurse must assess the client's ability to swallow safely. D. Assessing the client's swallowing reflex is the priority to ensure safe swallowing and prevent aspiration.