question: Jim's skin was noticeably darker than his friend Matt's skin. This means that _____ produces more melanin.
choices.text: Jim Matt
choices.label: A B
para: However, the melanocytes of people with darker skin produce more melanin.
para_anno.effect_prop: melatonin
para_anno.cause_dir_str: darker
para_anno.effect_dir_str: more
para_anno.cause_dir_sign: MORE
para_anno.effect_dir_sign: MORE
para_anno.cause_prop: darkness
question_anno.more_effect_dir: produces more
question_anno.more_effect_prop: melanin