You have a file containing outstanding AR invoices. The fields include Customer$\_$No$,$ Invoice$\_$Date, Region$\_$Code and Invoice$\_$Amt. If there are $10$ different regions, what is the most efficient way to create a separate aging report for each region?

a$.$

Apply a filter for all invoices in the first region and run the Age command. Then repeat the steps for the remaining $9$ regions.

b$.$

Extract all the invoices in the first region using a command filter and run the Age command on the result. Then repeat the steps for the remaining $9$ regions.

c$.$

Sort or Index the file by Region$\_$Code and run the Age command on the sorted file with the Region$\_$Code selected on the Break parameter.

d$.$

Index the file by Region$\_$Code and run the Age command on the indexed file with the Region$\_$Code selected on the Group parameter.