Sal believes that by 12-year-old, children have developed the capacity for logical thought. riley believes that logical thought develops gradually, and is not necessarily well established by age 12. which statement best summarizes sal and riley's positions? a. sal believes in a qualitative approach to development and riley believes in a quantitative approach to development. b. sal believes in a quantitative approach to development, while riley believes in a qualitative approach to development. c. sal believes that nature is dominant in development, while riley believes nurture is dominant. d. sal believes that nurture is dominant in development, while riley believes nature is dominant.