If hire_date stores the date an employee was hired, and birth_date the employee's date of birth, which of the following expressions is used in calculating the age (in years) the employee was when hired? A. TRUNC((hire_date - birth_date)/ 365.25) B. TRUNC(TO_YEAR(hire_date-birth_date)) C. hire_date-birth_date D. YEARS_BETWEEN(hire_date, birth_date)