Which of the following urges a person to use the restroom immediately upon feeling a slight need?

The correct choice is urge incontinence, which is characterized by a sudden and strong desire to urinate that often leads to the involuntary loss of urine. This condition occurs when there is a malfunction in the bladder's ability to hold urine, leading to an overactive bladder sensation. Individuals experiencing urge incontinence typically feel a compelling need to rush to the restroom as soon as they detect even a slight urge, making it essential for them to respond quickly to avoid accidents.

In contrast, functional incontinence typically arises from physical or cognitive limitations that prevent a person from making it to the restroom in time rather than from an intense urge. Overflow incontinence, on the other hand, occurs when the bladder is overly full and urine leaks out involuntarily, often without the strong urge that characterizes urge incontinence. None of the other options describe the immediate need and involuntary loss associated with urge incontinence, which is why this answer best fits the scenario presented.