Final answer:
The cause of symptomatic incontinence can vary, but it is often caused by an enlarged prostate gland in men and stretching of pelvic floor muscles or an overactive bladder in women. Nerve damage can also be a cause of symptomatic incontinence.
Step-by-step explanation:
The cause of symptomatic incontinence can vary depending on the individual. In men, it is usually caused by an enlarged prostate gland, while in women, it can be caused by stretching of pelvic floor muscles during childbirth (stress incontinence) or by an overactive bladder that empties without warning (urge incontinence). Nerve damage can also be a cause of symptomatic incontinence. Therefore, the correct answer is d. Nerve damage.