**Core Concept**
Normal urine output is a critical parameter in assessing the adequacy of renal function and fluid status in patients. The normal urine output is defined as the volume of urine produced by the kidneys per unit time, which is influenced by various factors including hydration status, renal function, and the presence of any obstructive or inflammatory processes.

**Why the Correct Answer is Right**
The normal urine output is typically considered to be 0.5 to 1.0 mL/kg/hour in adults. This range is based on the concept that the kidneys should be able to produce enough urine to maintain a stable fluid balance and electrolyte homeostasis. The kidneys produce urine through a process of filtration, reabsorption, and secretion, which is regulated by various hormones, including antidiuretic hormone (ADH) and aldosterone. The optimal urine output is also influenced by the presence of any underlying medical conditions, such as kidney disease, heart failure, or liver disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because urine output is typically measured in milliliters per kilogram per hour, not milliliters per kilogram per minute.
**Option B:** This option is incorrect because urine output of 0.1 mL/kg/hour is considered to be oliguric, which may indicate underlying kidney disease or other medical conditions.
**Option C:** This option is incorrect because urine output of 1.5 mL/kg/hour is considered to be polyuric, which may indicate underlying conditions such as diabetes insipidus or hyperglycemia.

**Clinical Pearl / High-Yield Fact**
A useful mnemonic to remember the normal urine output range is "50-100", which corresponds to 0.5 to 1.0 mL/kg/hour.

**Correct Answer: C. 1.0 mL/kg/hour.**