Pan Et Al (2005) Studied 1- to 3-Year-Old Children Living in Low-Income

Pan et al. (2005) studied 1- to 3-year-old children living in low-income families to understand the effect of maternal talk on children's vocabulary development. Which of the following was a finding of this study?

A) The amount of maternal talk was less important than maternal literacy skills.
B) The amount of maternal talk was more important than the amount of paternal talk.
C) Mothers' diversity of vocabulary was unrelated to children's vocabulary development.
D) Mothers who frequently used pointing gestures had children with a smaller vocabulary.