Imagine that you are working on a program that will create a report from data in a text file containing many product records. These records have already been grouped by product category in the file. The program will print the records by product category and will contain a temporary detour in its logic that prints a line stating the total products in one category before moving on to the next category. You declare a variable that you will use to store the category for each record processed so that its value can be compared with that of the next record processed as the program runs. What is this variable called?