The nurse instructs the female client concerning hormone replacement therapy for menopausal symptoms. Which of the following points should the nurse include in the client’s teaching plan

A. Estrogen therapy eliminates the need for supplemental calcium intake.
B. Estrogen therapy can reduce the risk of menopausal bone loss.
C. The risk of uterine cancer is decreased after menopause.
D. Smoking is associated with a later onset of menopaus

请补充fun函数，该函数的功能是：判断一个年份是否为闰年。
例如，1900年不是闰年，2004是闰年。
注意：部分源程序已给出。
请勿改动主函数main和其他函数中的任何内容，仅在fun函数的横线上填入所编写的若干表达式或语句。
试题程序：
#include＜stdio.h＞
#include＜conio.h＞
int fun(int n)

int flag=0；
if(n%4==0)
if( (1) )
int year；
printf("Input the year：")；
scanf("%d"，&year)；
if(fun(year))
flag=1；
if( (2) )
flag=1；
return (3) ；

rnain()

printf("%d is a leap year.\n"，year)；
else
printf("%d is not a leap year.\n"，year)；