_____ refers to standardizing products by dividing them into subgroups and displaying and labeling them so that consumers clearly understand their nature and quality.

A) Transporting
B) Grading
C) Selling
D) Storing
E) Financing

Grading refers to the process of categorizing products into different groups based on quality, size, weight, etc., to facilitate understanding of their nature and quality for consumers. This standardization helps in simplifying choices for buyers.