You added this code to
functions.php but it causes a fatal error:
function greet_user() {
echo 'Hello!';
}
add_action('init', greet_user);
What is the cause of the error?
AThe <code>add_action</code> call is missing a priority parameter.
BThe <code>init</code> hook cannot be used in <code>functions.php</code>.
CThe function should return a value instead of echoing.
DThe function name is not quoted in the <code>add_action</code> call.
