Final answer:
Transitional epithelium, which is stratified and can change shape, is found lining the urinary bladder, allowing it to expand and contract as it fills and empties.
Step-by-step explanation:
Transitional epithelium is found lining parts of the urinary system. This type of epithelium is capable of stretching and allows the urinary bladder to expand as it fills with urine. The proper answer to the question is a) lining the urinary bladder. Transitional epithelium is stratified and changes in appearance based on how full the bladder is.
When empty, the bladder's epithelium is thicker and the cells are cuboidal. As the bladder fills, the epithelial layer unfolds to accommodate the urine, and cells transition to a thinner, squamous shape. It is specifically designed to cope with the fluctuating volume within the urinary bladder.