What will the following program display if the phrase hello world is entered at the prompt?

#include

void print(void);

int main()

{

printf("Input a line: ");

print();

}

void print(void)

{

char c;

if ((c = getchar()) != ' ')

print();

putchar(c);

}

A) hello

B) hello world

C) dlrow olleh

D) The program will not execute