Explanation
The handlebars helper function that is used on Salesforce B2B Commerce pages and components for formatting price values is formatPrice. This function will format a numeric value as a price according to the currency settings and locale of the storefront. For example, {{formatPrice price}} will format the price value as $1,234.56 for US dollars or €1.234,56 for euros. Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Handlebars Helpers

Explanation
A developer has written the logic to import products from an enterprise resource planning (ERP) platform into B2B storefront products. The imported products are in Salesforce, but they are not visible in the store. The developer forgot to assign the storefront to the imported products. A storefront is a logical grouping of products, categories, and price books that defines what products are available for purchase in a B2B Commerce site1. A product must be associated with at least one storefront to be visible in the store2. The developer can use the Data Loader to insert or update the storefront assignments for the imported products3.
Option A, Option C, and Option D are incorrect because they are not required for the products to be visible in the store. An entitlement policy is a set of rules that determines the availability of products based on the buyer's account, contract, or order history4. An account is a record that represents a business or person involved in a business transaction. A promotion is a marketing tool that offers discounts or incentives to buyers. These are optional features that can be used to customize the B2B Commerce experience, but they are not necessary for the products to be visible in the store. References:
* Storefronts
* Product Visibility
* Insert new Products and custom Price Books via Data Loader
* Entitlement Policies
* [Accounts]
* [Promotions]

To know if a CSS file containing small changes was actually deployed to the org, one way that a developer can accomplish this is by right-clicking the CSS file and choosing Diff File Against Org. Diff File Against Org is an option that allows the developer to compare a local file with its remote version in the org using Salesforce CLI commands. The developer can use Visual Studio Code to execute these commands by right-clicking on files or folders in the project and choosing from various diff options. Right-clicking the CSS file and choosing Diff File Against Org allows the developer to see the differences between the local CSS file and the remote CSS file in the org side by side in Visual Studio Code. This way, the developer can verify if their changes were deployed successfully or not. Clicking the Tools menu and selecting Diff Styles Against Org... is not a valid way to know if a CSS file was deployed to the org, as there is no such option in Visual Studio Code or Salesforce CLI. Right-clicking the folder for the component and choosing Diff Styles Against Org is not a valid way either, as there is no such option in Visual Studio Code or Salesforce CLI. Right-clicking the folder for the component and choosing Diff Files Against Org is not a valid way either, as it will compare all the files in the folder, not just the CSS file, which may not be efficient or necessary. Salesforce Reference: [Salesforce CLI Command Reference: force:source:diff], [Salesforce Developer Tools for Visual Studio Code]