Final answer:
The small-framed, thin 45-year-old white woman would be identified by the nurse as having the greatest risk for osteoporosis due to factors such as being a woman, older age, and small-framed.
Step-by-step explanation:
The nurse would identify the small-framed, thin 45-year-old white woman as having the greatest risk for osteoporosis. Osteoporosis is more common in women, especially after menopause, and being small-framed and thin further increases the risk. Additionally, the nurse would consider factors such as age and family history of osteoporosis as additional risk factors.