Final answer:
Dupuytren's disease involves the contraction of the palmar fascia, which can cause the fingers to become permanently bent.
Step-by-step explanation:
Dupuytren's disease is characterized by the contraction of the palmar fascia, which is a tough band of tissue in the palm of the hand. Although not explicitly mentioned in your provided materials, which focus on the anatomy of the wrist and carpal tunnel syndrome involving the median nerve, Dupuytren's disease differs as it primarily affects the palmar fascia causing nodules and cords that can eventually lead to a contracture in the fingers, typically the ring and little fingers. Therefore, the correct answer is A. Palmar fascia.