The following code generates an error. Why?

#include

#include

using namespace std;

int main$()\{$

ofstreamoutFS;

if $(!$outFS.is$\_$open$())\{$

cout $<<$ "Could not open file myfile.txt$."<<$ endl;

return $1$;

$\}$

outFS $<<$ "Hello" $<<$ endl;

outFS $<<"123"<<$ endl;

outFS.close$()$;

return $0$;

$\}$

Group of answer choices

Data cannot be directly fed into ofstream using outFS $<<$

outFS.close$()$; is not used correctly

The file 'myfile.txt$\text{'}$ has not been opened

The code is missing a header