Which is the mildest morphine derivative?

Which of the following statements is true about individual and group differences in pubertal growth?

A) Heredity contributes substantially to the timing of pubertal changes. B) In developing countries, boys and girls reach pubertal milestones at about the same age. C) Girls who begin rigorous athletic training at an early age usually experience early puberty. D) In developing countries, girls from affluent families consistently reach menarche 6 to 18 months later than those from economically disadvantaged homes.

Research suggests that children with autism

A) are especially skilled at distinguishing facial expressions and engaging in social referencing. B) are more advanced than their agemates in make-believe play. C) have difficulty with false-belief tasks long after they reach the intellectual level of an average 4-year-old. D) have smaller-than-average brains.