Which of the following best describes a key difference between the cognitive development theories proposed by Piaget and Vygotsky?

A. Piaget focused on language as a particularly important aspect of development.
B. Vygotsky proposed that development was influenced by culture.
C. Piaget focused on the influence of the social environment in development.
D. Vygotsky proposed stages of development defined by key cognitive milestones.

Answer: B