Suppose that you want to write a program that inputs customer data and displays a summary of the number of customers who owe more than $1000 each, in each of 12 sales regions. customer data variables include name, zip-code, balance due, and region number. at some point during record processing, you would add 1 to an array element whose subscript would be represented by a. name
b. zip code
c. balance due
d. region number

The correct option is D = regionNumber

Explanation:

In this scenario we want to know customers who owe more than $1000 each, in each of 12 sales regions. And the customer data variables include name, zip-code, balanceDue and regionNumber; based on the customer data variables names and zip-code will not really affect our output. It is based on balanceDue that we increment the number of customer owing in a particular region (regionNumber).

Therefore, we would add 1 to an array element whose subscript would be represented by regionNumber since we are interested to know the number of customer owing in each of the 12 sales regions.

answer would be