Sally's librarian told her that she could increase the size of her vocabulary by spending more time reading. Based on this infor
mation, which statement below best describes the size of Sally's vocabulary? A) The size of Sally's vocabulary is neither an independent nor dependent variable.
B) The size of Sally's vocabulary is both an independent and a dependent variable.
C) The size of Sally's vocabulary is a dependent variable.
D) The size of Sally's vocabulary is an independent variable.