The scenario requires a guided, multi-step digital application with complex data capture, high-volume processing, and precise branding for external users. The OmniStudio suite, a core part of Salesforce Public Sector Solutions, is specifically designed for these requirements.

OmniScripts provide the guided, step-by-step "application form like experience," declaratively.

DataRaptors and Integration Procedures handle the high-volume data extraction and loading between the form and Salesforce objects efficiently without complex code.

FlexCards and the underlying Lightning Web Component framework of OmniScripts allow for the "pixel-perfect branding" and rich user interface required within an authenticated Experience Cloud site (community).

This combination provides a scalable, declarative solution to build and deploy the grant application.

A. OmniChannel, Flows, Apex, and DataLoader: OmniChannel is for routing work to agents and DataLoader is for bulk data migration; neither is used for building a real-time, customer-facing application form.

B. Scripts, Einstein Al, Assessments, and Grants: This option lists generic terms ("Scripts") or features ("Einstein AI," "Assessments") that are not the primary tools for building the required guided digital experience.

D. Application Form, Lightning Web Components, Communities, and Applications: This option is too generic. "Application Form" is the outcome, not the tool. While LWCs and Communities are involved, OmniStudio is the specific toolset designed for this use case.

1. Salesforce Help, Public Sector Solutions Documentation, "OmniStudio for Public Sector Solutions": "Public Sector Solutions uses the full power of OmniStudio to help you create guided interactions, decision-making support, and branded digital experiences... Use OmniScripts to create guided paths for completing a business process, such as applying for a license or a benefit." This directly links OmniScripts to the grant application use case.

2. Salesforce Help, OmniStudio Documentation, "OmniScripts": "An OmniScript is a guided interaction that you create in OmniStudio. OmniScripts guide users through complex processes, can be deployed to a Salesforce Experience site, and can be styled with custom branding." This confirms its role in creating guided, branded experiences for external users.

3. Salesforce Help, OmniStudio Documentation, "DataRaptors": "A DataRaptor is a mapping tool that enables you to read, transform, and write Salesforce data." This supports the requirement for structured data capture matching the paper form and handling high volumes efficiently.

4. Salesforce Trailhead, "OmniStudio and Public Sector Solutions" Module: This module explains how OmniStudio components work together to build digital-first experiences for constituents. It states, "With OmniStudio, you can build guided, branded, and mobile-friendly experiences for your constituents... For example, you can create an online application for a small business grant." This explicitly validates the use of OmniStudio for this exact scenario.