Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Selenium and Vitamin E Cancer Prevention Trial (SELECT) for Prostate Cancer
Brief Summary: RATIONALE: Chemoprevention therapy is the use of certain drugs to try to prevent the development of cancer. It is not yet known which regimen of selenium and/or vitamin E may be more effective in preventing prostate cancer.

PURPOSE: Randomized phase III trial to determine the effectiveness of selenium and vitamin E, either alone or together, in preventing prostate cancer.


Options:
A: Arm Label: Vitamin E + selenium placebo; Type: EXPERIMENTAL; Interventions: Drug: Vitamin E, Other: selenium placebo | Arm Label: Selenium + vitamin E placebo; Type: EXPERIMENTAL; Interventions: Drug: Selenium, Other: Vitamin E placebo | Arm Label: Vitamin E + selenium; Type: EXPERIMENTAL; Interventions: Drug: Vitamin E, Drug: Selenium | Arm Label: Vitamin E placebo + selenium placebo; Type: PLACEBO_COMPARATOR; Interventions: Other: Vitamin E placebo, Other: selenium placebo | Intervention Type: DRUG; Name: Vitamin E; Assigned to Arm(s): Vitamin E + selenium, Vitamin E + selenium placebo | Intervention Type: DRUG; Name: Selenium; Assigned to Arm(s): Selenium + vitamin E placebo, Vitamin E + selenium | Intervention Type: OTHER; Name: Vitamin E placebo; Assigned to Arm(s): Selenium + vitamin E placebo, Vitamin E placebo + selenium placebo | Intervention Type: OTHER; Name: selenium placebo; Assigned to Arm(s): Vitamin E + selenium placebo, Vitamin E placebo + selenium placebo
B: Arm Label: Placebo; Type: PLACEBO_COMPARATOR; Interventions: Other: Placebo | Arm Label: 50ug selenium enriched yeast; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 50ug selenium enriched yeast | Arm Label: 100ug selenium enriched yeast; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 100ug selenium enriched yeast | Arm Label: 200ug selenium enriched yeast; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 200ug selenium enriched yeast | Arm Label: Control onion; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Control onion | Arm Label: Enriched onion; Type: EXPERIMENTAL; Interventions: Dietary Supplement: Enriched onion | Intervention Type: DIETARY_SUPPLEMENT; Name: 50ug selenium enriched yeast; Assigned to Arm(s): 50ug selenium enriched yeast | Intervention Type: DIETARY_SUPPLEMENT; Name: 100ug selenium enriched yeast; Assigned to Arm(s): 100ug selenium enriched yeast | Intervention Type: DIETARY_SUPPLEMENT; Name: 200ug selenium enriched yeast; Assigned to Arm(s): 200ug selenium enriched yeast | Intervention Type: DIETARY_SUPPLEMENT; Name: Control onion; Assigned to Arm(s): Control onion | Intervention Type: DIETARY_SUPPLEMENT; Name: Enriched onion; Assigned to Arm(s): Enriched onion | Intervention Type: OTHER; Name: Placebo; Assigned to Arm(s): Placebo
C: Arm Label: 1; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 20 µg selenium | Arm Label: 2; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 40 µg selenium | Arm Label: 3; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 60 µg selenium | Arm Label: 4; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 80 µg selenium | Arm Label: 5; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 100 µg selenium | Arm Label: 6; Type: EXPERIMENTAL; Interventions: Dietary Supplement: 120 µg selenium | Arm Label: 7; Type: PLACEBO_COMPARATOR; Interventions: Dietary Supplement: placebo | Intervention Type: DIETARY_SUPPLEMENT; Name: 20 µg selenium; Assigned to Arm(s): 1 | Intervention Type: DIETARY_SUPPLEMENT; Name: 40 µg selenium; Assigned to Arm(s): 2 | Intervention Type: DIETARY_SUPPLEMENT; Name: 60 µg selenium; Assigned to Arm(s): 3 | Intervention Type: DIETARY_SUPPLEMENT; Name: 80 µg selenium; Assigned to Arm(s): 4 | Intervention Type: DIETARY_SUPPLEMENT; Name: 100 µg selenium; Assigned to Arm(s): 5 | Intervention Type: DIETARY_SUPPLEMENT; Name: 120 µg selenium; Assigned to Arm(s): 6 | Intervention Type: DIETARY_SUPPLEMENT; Name: placebo; Assigned to Arm(s): 7
D: Intervention Type: BEHAVIORAL; Name: ascorbic acid, vitamin E, beta carotene, selenium, zinc; Assigned to Arm(s): N/A

Answer: A