The study of Dr. Ruth Mace and Dr. Rebecca Sear shows that a child% growth may be affected ______.

A．The sufferings of eider females have been ignored for a long time.
B．Old women’s special role in society has been underestimated.
C．Paternal grandmothers are equally important for a child as maternal ones.
D．There are low proportions of older adults among "primitive" cultures.

A．It makes people think of kindness, frailty, old fashion, etc.
B．The word has different associations for different people.
C．The word brings a sense of security to children.
D．The word means an impediment to real researc