For Which Patient Who Has Severe Osteoporosis Is a Drug

For which patient who has severe osteoporosis is a drug from the bisphosphonate class of drug a better choice of therapy than a drug from the estrogen agonist/antagonist class?

A) 40-year-old premenopausal woman who engages in aerobic exercise daily.
B) 64-year-old woman who takes hormone replacement therapy for hypothyroidism.
C) 70-year-old woman who is 3 weeks postoperative from a total abdominal hysterectomy.
D) 80-year-old woman who has had a stroke and must use a walker for all ambulation.