d. add a second copy of the payment field to the values area of the field list, and then change its summary function to average so that marina can compare the average payments to the totals.
A. Duplicate the payment field and place it in the values area of the field list. Change its summary function to average for Marina to compare average payments to totals.
B. Copy the payment field and add it to the values area in the field list. Modify its summary function to average, allowing Marina to compare average payments with totals.
C. Add a second instance of the payment field to the values area of the field list. Adjust its summary function to average, enabling Marina to compare average payments to totals.
D. Duplicate the payment field and include it in the values area of the field list. Change its summary function to average, enabling Marina to compare average payments to totals.