Which of the following client statements would cause the nurse to further question the client?

Choice A reason: Black, tarry stool while taking ferrous sulfate may indicate gastrointestinal bleeding, a serious condition, rather than a normal side effect (greenish-black stool). This requires further questioning to rule out hemorrhage, making it the priority. Choice B reason: Dizziness upon standing suggests orthostatic hypotension, a common issue that warrants monitoring but is less urgent than potential bleeding. It requires clarification but is not as critical as black stool. Choice C reason: Taking medication with orange juice is generally safe, though it may affect absorption of some drugs. This is less concerning than black stool, which could indicate bleeding, making it a lower priority. Choice D reason: Skipping a dose due to feeling fine indicates non-compliance, which needs education but is not immediately life-threatening. Black stool suggesting bleeding is more urgent, making this less critical for questioning.