Josh Was a Participant in a Clinical Study to Determine

Josh was a participant in a clinical study to determine how much thiamin cures beriberi,the vitamin's deficiency disease.During the study,Josh consumed only a formula diet that was nutritionally complete,except it did not contain thiamin.Within a few weeks,Josh developed beriberi.At that point,researchers gave 0.20 mg thiamin to Josh each day for a week,but his signs and symptoms of beriberi remained.In the weeks that followed,the scientists continued to increase Josh's intake of the vitamin by 0.2 mg/week.After a week of taking 0.6 mg of thiamin/day,Josh reported feeling much better.Based on this information,the researchers concluded that Josh's

A) requirement for thiamin was at least 0.6 mg/day.
B) AMDR for thiamin was between 0.2 and 0.6 mg/day.
C) RDA for thiamin was 0.6 mg/day.
D) requirement for thiamin was 0.20 mg/day.