Answer :
Final answer:
The most at-risk client for osteoporosis is option B, a 66-year-old white woman with a small stature and low body weight. Her advanced age and European ancestry further contribute to her risk.
Explanation:
The client most at risk for osteoporosis among the given options is B. A 66-year-old white woman, who is 5 foot 1 inch tall and weighs 100 lb. The risk factors that make her most susceptible include her advanced age, being of European ancestry, having a small stature and low body weight, and potentially other lifestyle factors not specified in the question such as diet, exercise, and family history of osteoporosis. The other clients listed may also have risk factors, but based on the information provided, this individual appears to have a higher convergence of risk factors for osteoporosis.