It suddenly ______ to the detective that the professor was probably murdered by his own wife .

A．came about

B．took place

C．happened

D．occurred

以上程序运行后的输出结果是 【9】 。
main()
int i=10,j=0;
do
j=j+i; i-;
while(i＞2);
printf("%d\n"j);