The pension plan offered by Fulton County School District provides the retired teachers with an annual payment that is calculated as 1% of their 'high 5 average salary' for each year that they taught in the District. Mary's highest five years of pay in the district included these annual salaries: $42,821; $44,201; $45,993; $47,535; and $49,450. She worked 30 years for the District. What will her annual pension be? A. Her defined benefit plan pension will be $15,333. B. Her defined benefit plan pension will be $46,000. C. Her defined contribution plan pension will be $13,800. D. Her defined benefit plan pension will be $13,800.