Salesforce Consumer Goods Cloud structures the promotion check task to be performed at three distinct levels during a store visit. This allows field representatives to accurately verify the execution of different marketing campaigns. The three methods are:

1. General Promotion: For promotions that apply to the entire store, such as entrance banners or general store-wide discounts, not tied to a specific product or category.

2. Individual Product: For promotions specific to a single stock-keeping unit (SKU), like a "buy one, get one free" offer on a particular brand of soda.

3. Product Category: For promotions that apply to a group of related products, such as "20% off all dairy products."

A. Clearance Promotion, Volume Promotion, and Product Coupons are examples of promotion tactics or mechanics, not the hierarchical levels at which the check is performed in the system.

B. While "Individual Product" is correct, "Product Coupons" and "Volume Promotion" describe types of offers, not the distinct ways the promotion check task is categorized.

C. "Product Category" is a correct level, but "Unit Promotion" and "Product Coupons" are specific types of promotional deals, not the defined methods for executing the check.

1. Salesforce Help Documentation: Promotion Check. This document explicitly states, "You can perform promotion checks for a promotion that's applicable for a store in general, for a specific product, or for a product category." This directly corresponds to the options in answer D.

2. Salesforce Trailhead: Visit Execution in Consumer Goods Cloud module, Execute a Visit unit. Under the "Promotion Check" section, it details the process: "During a promotion check, a sales rep verifies whether a promotion is running as planned in a store. The rep can check for promotions for a specific product, a product category, or a general promotion."

3. Salesforce Help Documentation: Set Up Promotion Check. The setup instructions for this feature involve associating promotions with products (PromotionProduct) and categories (PromotionProductCategory), which reinforces the system's design around these three distinct levels of checks.