Final answer:
Transitional epithelium is found in the urinary bladder and allows it to stretch and slide to create a barrier.
Step-by-step explanation:
The correct answer is A. Transitional epithelium. Transitional epithelium is found in the urinary bladder and it allows the bladder to stretch and slide, creating a barrier. When the bladder is relaxed and empty, the cells of transitional epithelium appear to pile up on top of each other, giving the tissue a stratified appearance. As the bladder fills with urine, the cells of transition epithelium unfold and expand to accommodate the volume of urine.