question: Suppose that Mary smokes cigarettes for 20 years. If you measured the oxygen levels in her blood before she started smoking and compared them to oxygen levels later in her life, what would you find?
choices.text: less oxygen in her blood later in life more oxygen in her blood later in life
choices.label: A B
para: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.
para_anno.effect_prop: less oxygen in the blood
para_anno.effect_dir_str: less
para_anno.cause_dir_sign: MORE
para_anno.effect_dir_sign: LESS
para_anno.cause_prop: smoking
question_anno.more_effect_dir: more
question_anno.less_effect_dir: less
question_anno.less_cause_prop: smoking
question_anno.more_effect_prop: oxygen in her blood
question_anno.less_effect_prop: oxygen in her blood
question_anno.less_cause_dir: oxygen in her blood