**Core Concept**
Schneider's first-rank symptoms are a set of specific, bizarre hallucinations and delusions that are characteristic of schizophrenia, as described by Kurt Schneider in 1959. These symptoms are considered to be highly suggestive of schizophrenia and are used as diagnostic criteria in psychiatry.

**Why the Correct Answer is Right**
Schneider's first-rank symptoms include hallucinations that are heard in one's own voice (hearing one's own voice commenting on one's actions), voices heard arguing, voices commenting on one's thoughts, and voices heard giving a running commentary on one's actions. These symptoms are thought to be indicative of the presence of a thought disorder, which is a hallmark of schizophrenia.

**Why Each Wrong Option is Incorrect**
**Option A:** Hallucinations that are heard in one's own voice are a first-rank symptom. This is an example of a Schneider's first-rank symptom.
**Option B:** Voices heard arguing are also considered a first-rank symptom, as they are indicative of a thought disorder.
**Option C:** Voices heard giving a running commentary on one's actions is another example of a first-rank symptom, which is characteristic of schizophrenia.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that Schneider's first-rank symptoms are not diagnostic in isolation and should be considered in conjunction with other clinical features and diagnostic criteria to establish a diagnosis of schizophrenia.

**Correct Answer: D.**