A form processing facility identifies the first page of each tax return by the existence of a tax payer ID value in the format aaaaa-nnnnn-aaaaa next to the Tax Payer ID label. Depending on the quality of the received form it is common for one of the hyphens to be removed by ImageFix. What method of finding data would be the most efficient and reliable way to identify the main page?
B is the right answer only because RegEx is the most flexible when trying to locate the value. It’s also the only way of the three to test a value that isn’t known by any existing database.