question: Caucasian Americans have lighter skin than other Americans. Researchers were not surprised to discover therefore, that vitamin D insufficiency among Caucasian Americans is _____ than among other Americans?
choices.text: more prevalent less prevalent
choices.label: A B
para: Pigments in the skin act like a filter that can prevent the skin from making vitamin D. As a result, people with darker skin need more time in the sun than people with lighter skin to make the same amount of vitamin D.
para_anno.effect_prop: vitamin D
para_anno.cause_dir_str: darker
para_anno.effect_dir_str: prevent
para_anno.cause_dir_sign: MORE
para_anno.effect_dir_sign: LESS
para_anno.cause_prop: darker skin
question_anno.more_effect_dir: less prevalent
question_anno.less_effect_dir: more prevalent
question_anno.less_cause_prop: skin
question_anno.more_effect_prop: vitamin D insufficiency
question_anno.less_effect_prop: vitamin D insufficiency
question_anno.less_cause_dir: vitamin D insufficiency