A．They can never be proved or disproved.
B．They were formed without proper evidence.
C．They explain only certain types of the phenomenon.
D．They are contradicted by her research.

A．By recording children's responses to familiar faces.
B．By observing children's reaction to a repeated series of actions.
C．By having children imitate each other's actions.
D．By having children imitate an ordered sequence of actions.

A．Young children do not develop the capacity for recall until after age 3.
B．The development of memory did not depend on language development.
C．Young children typically remember events for about nine months.
D．The formation of memory is dependent upon language development.