Final answer:
The normal range for pH of urine is C) 4.5 to 8, shown in option C. This range is maintained by various dietary influences and is crucial for health.
Step-by-step explanation:
The normal range for the pH of urine is between 4.5 and 8. Option C correctly identifies this range. The pH scale as a whole ranges from 0 to 14, with values below 7 being acidic and values above 7 being alkaline or basic.
Neutral pH is 7, which is the pH value of pure water. In the human body, the pH of different fluids is tightly regulated. For instance, blood usually has a pH of around 7.4.
Diet is known to affect urine pH; for example, consuming meats can lower the pH while eating citrus fruits, vegetables, and dairy products can raise the pH. It is crucial for health that the pH of urine remains within its normal range, as consistently high or low values can lead to medical complications.