The purpose of numbering the document as attached in the image is to indicate the steps that are involved in a process.
What is numbering?
Numbering refers to a method of giving appropriate numbers to a chronological sequence in a form of text. Numbering has a number of applications in writing form.
In the above example, the document has been numbered in order to imply the number of steps that are involved to apply a discount to an employee purchase. It also serves the purpose of numbering.
Hence, option A holds true regarding numbering. The complete question has been attached as an image for better reference.
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