The nurse is completing an admission assessment on an older adult client with dehydration, failure to thrive, and who is immobile. The nurse reports to the healthcare provider that the client's right calf is red and swollen. The nurse should suspect which probable cause of these findings?

Choice A reason: Fat emboli are typically associated with long bone fractures and not commonly linked with dehydration or immobility. Choice B reason: Deep vein thrombosis (DVT) is a common condition in immobile patients, and redness and swelling in the calf are classic signs. Choice C reason: While infection can cause redness and swelling, it is usually accompanied by other signs such as fever, which is not mentioned here. Choice D reason: Pulmonary embolism is a complication that can arise from DVT but would not be the direct cause of calf redness and swelling.