有下列程序#include #include typedef struct stu {char name[9];char gender;int score;} STU;STU f(STU a){ STU c={"Sun", 'f', 90};strcpy(a.name,c.name);a.gender = c.gender;a.score = c.score;return a;}main( ){ STU a={"Zhao", 'm', 85},b={"Qian", 'f', 95} ;b=f(a);printf("%s,%c,%d,%s,%c,%d",a.name, a.gender, a.score, b.name,b.gender, b.score);}程序执行后的输出结果是（）。

A. Zhao,m,85,Sun,f,90
B. Zhao,m,85,Qian,f,95
C. Sun,f,90,Sun,f,90
D. Sun,f,90,Qian,f,9