A 62-year-old woman who lives alone tripped on a rug in her home and fractured her hip. Which predisposing factor most likely contributed to the fracture in the proximal end of her femur?

A. Failing eyesight resulting in an unsafe environment
B. Renal osteodystrophy resulting from chronic kidney disease (CKD)
C. Osteoporosis resulting from declining hormone levels
D. Cerebral vessel changes causing transient ischemic attacks