Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Determination of RDA for Vitamin D in Caucasian and African American Women
Brief Summary: The purpose of this study is to examine the effects of several doses of vitamin D on hormones related to bone, calcium absorption, bone density and muscle strength.


Options:
A: Intervention Type: DRUG; Name: cholecalciferol; Assigned to Arm(s): N/A | Intervention Type: BEHAVIORAL; Name: Physiotherapy; Assigned to Arm(s): N/A
B: Arm Label: 1; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Ergocalciferol (vitamin D2), Dietary Supplement: Placebo | Arm Label: 2; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Ergocalciferol (vitamin D2), Dietary Supplement: Placebo | Arm Label: 3; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Cholecalciferol (vitamin D3), Dietary Supplement: Placebo | Arm Label: 4; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Cholecalciferol (vitamin D3), Dietary Supplement: Placebo | Intervention Type: DIETARY_SUPPLEMENT; Name: Cholecalciferol (vitamin D3); Assigned to Arm(s): 3 | Intervention Type: DIETARY_SUPPLEMENT; Name: Ergocalciferol (vitamin D2); Assigned to Arm(s): 1 | Intervention Type: DIETARY_SUPPLEMENT; Name: Ergocalciferol (vitamin D2); Assigned to Arm(s): 2 | Intervention Type: DIETARY_SUPPLEMENT; Name: Cholecalciferol (vitamin D3); Assigned to Arm(s): 4 | Intervention Type: DIETARY_SUPPLEMENT; Name: Placebo; Assigned to Arm(s): 1, 2, 3, 4
C: Intervention Type: DRUG; Name: hormone replacement therapy; Assigned to Arm(s): N/A | Intervention Type: DRUG; Name: estrogens; Assigned to Arm(s): N/A | Intervention Type: DRUG; Name: progestins; Assigned to Arm(s): N/A | Intervention Type: DRUG; Name: estrogen replacement therapy; Assigned to Arm(s): N/A | Intervention Type: BEHAVIORAL; Name: diet, fat-restricted; Assigned to Arm(s): N/A | Intervention Type: DRUG; Name: calcium; Assigned to Arm(s): N/A | Intervention Type: DRUG; Name: vitamin D; Assigned to Arm(s): N/A | Intervention Type: BEHAVIORAL; Name: dietary supplements; Assigned to Arm(s): N/A
D: Arm Label: vitamin D3 400 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: vitamin D3 800 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: vitamin D3 1600 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: vitamin D3 2400 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: vitamin D3 3200 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: vitamin D3 4000 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: vitamin D3 4800 IU daily; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Vitamin D3, Dietary Supplement: Calcium Citrate (Citracal) | Arm Label: placebo; Type: PLACEBO_COMPARATOR; Interventions: Dietary Supplement: Vitamin D3 | Intervention Type: DIETARY_SUPPLEMENT; Name: Vitamin D3; Assigned to Arm(s): placebo, vitamin D3 1600 IU daily, vitamin D3 2400 IU daily, vitamin D3 3200 IU daily, vitamin D3 400 IU daily, vitamin D3 4000 IU daily, vitamin D3 4800 IU daily, vitamin D3 800 IU daily | Intervention Type: DIETARY_SUPPLEMENT; Name: Calcium Citrate (Citracal); Assigned to Arm(s): vitamin D3 1600 IU daily, vitamin D3 2400 IU daily, vitamin D3 3200 IU daily, vitamin D3 400 IU daily, vitamin D3 4000 IU daily, vitamin D3 4800 IU daily, vitamin D3 800 IU daily

Answer: D