38)有以下定义和语句   struct workers   { int num;char name[20];char c;   struct   {int day; int month; int year;} s;   };   struct workers w,*pw;   pw=&w;   能给w中year成员赋1980的语句是
(A)*pw.year=198O;   
(B)w.year=1980;   
(C)pw->year=1980;   
(D)w.s.year=1980;

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