Lily is 10 years old. she gets a score of 97 on an iq test. what does this tell us about her intellectual ability? a. lily must be a very smart girl—100 is a perfect score. b. lily is brighter than almost two-thirds of her age-mates, as iq scores go up to about 150. c. lily's score is in the bottom fifth of the population. d. lily's score is about average for her age-group.