What is the output of this program?

#include<stdio.h>
#include<fcntl.h>
 
int main()
{
    pid_t fd;
    char ch;
    int count;
    fd = open("demo.c",O_RDONLY);
    do{
        count = read(fd,&ch,1);
        printf("%c",ch);
    }while(count);
    return 0;
}

A. countw B. wcount C. wc D. count p E. None of the above

A. dm B. rm C. delete D. erase E. None of the above

A. rdir B. remove C. rd D. rmdir E. None of the above

A. x B. y C. a D. z E. None of the above