What is the author's attitude toward "educational toys"

A．advocate the importance of the early-year education
B．develop the education market for parents and children
C．emphasize parent's wise investment on children
D．explain in detail the science on networks of nerves

A．parents should save more money for children's college education
B．the brain can develop until the adult age
C．babies turns angry when not given enough toys
D．too many toys may affect a child's development