Which of the following is a valid reason why the query below will not execute successfully?

SELECT employee$\_$id$,$ last$\_$name, salary

FROM employees

WHERE department$\_$id $=$

$($SELECT department$\_$id FROM employees WHERE last$\_$name LIKE $\text{'}\%$u$\%\text{'})$;

Group of answer choices

A single, rather than a multiple value operator was used.

The greater than operator is not valid.

First subquery not enclosed in parentheses.

Second subquery found on the right instead of the left side of the operator.