Question 1
In 1978, nearly 30% of children aged 5 to 10 years had dangerously elevated levels of lead in their blood, which can cause brain damage. What was the rate in 2001?
◦ 1%
◦ 11%
◦ 21%
◦ 31%
Question 2
In a Guatemalan study that examined nutrition and development, children who were classified as having ____ were more likely than children with ____ to explore new environments in middle childhood and persist in a frustrating situation.
◦ low body mass index; high body mass index
◦ high body mass index; low body mass index
◦ low nutrient levels; high nutrient levels
◦ high nutrient levels; low nutrient levels