【单选题】

Passage 1 Of all the family members,grandparents are probably the least valueD、They are just the people who have always been arounD、They make a fuss over the children in the family,show off to their friends the achievements of this child or that child,and show countless pictures of new babies. Grandfathers can fix anything,and grandmothers always have homemade biscuits arounD、 When you are small,it’s fun to stay with your grandparents because they always let you do things you can’t do at home,and,of course,they buy you things.They are always able to babysit because they don’t go out much and actually prefer to see their grandchildren.They are usually good for a small loan now and then doesn’t need to be paid back because they turn it into a gift.You respectfully listen to their advice but don’t thank them politely for what they do for you,and then don’t call or visit them until you need something else.And,of course,you never tell them how dear they are to you because they know how you feel about them anyway.Then all of a sudden,they are no longer there to do the things that only grandparents can do,and you find yourself wishing that you had told them what they meant to you as people and not just as grandparents. Children never tell their grandparents how dear they are to them because().

A、they don’t like their grandparents.
B． they take for granted everything their grandparents do for them.
C． their grandparents know how they feel
D． they do not respect their grandparents