Questions  16-20  are  based  on  the  following  Passage：

    Regular child care provided outside home or by someone other than the mother does not

In itself undermine healthy emotional connections between mothers and their 15－month－old

Infants，according to a long－term national study．The finding holds even If care begins during

the first 3 months after birth and runs for 30 hours or more per week．

    Among  infants  who  receive  unkind  and unresponsive  care from their mothers，however，

the mother－child relationship may be damaged．“This research helps us put apart complexities

regarding child care that have not previously been studied In detail，” 

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