Comprehensive and Detailed Explanation From Exact Extract: Extension building in SAP S/4HANA is simplified by using a guided wizard in tools like SAP Build Code for step-by-step development, and by leveraging business context to ground extensions in relevant data and processes, ensuring clean core principles and seamless integration.

Exact extracts supporting this:

Guided wizard: "SAP Build has been designed as the optimal way to extend SAP S/4HANA Cloud... with guided processes."news.sap.com "Creating an SAP S/4HANA extension app in 60 minutes with guided wizards."community.sap.com

Business context: "Extend SAP S/4HANA in the cloud and on premise with ABAP-based extensions using business context."community.sap.com "This guide provides a simplified introduction to extending SAP's Enterprise Resource Planning (ERP) offerings using business context."help.sap.com

Other options are incorrect because:

Option A: Joule assists in code generation and explanation but is not the primary method for simplifying extension building; wizards and context are emphasized.

Option D: Explaining legacy code is a Joule feature but applies more to migration than direct extension simplification in S/4HANA.

References from Positioning SAP Business AI Solutions as part of SAP Business Suite documents or Study Guide: Based on SAP Community blog "SAP S/4HANA Extensibility – Simplified Guide for Beginners" and SAP Help Portal "Getting Started with Extensibility." These position guided wizards and business context as key simplifiers for extensions in S/4HANA, aligned with C_BCBAI_2502 certification.