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

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

A．must have gained abundant profit
B．plays a vital role in promoting the early-year education
C．has sponsored the neuroscience research
D．has stimulated children's desire for toys