题目内容：
请分析下列程序。int main()
{
printf("This is in main program");
if(fork()==0)
printf("I am in child process");
else
printf("I am in parent process");}
程序正确运行后结果是 A．This is in main program I am in child process I am in parent process
B．This is in main program I am in child process
C．This is in main program I am in parent process
D．This is in main program I am in child process This is in main program I am in parent process
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答案解析：