Final answer:
The Agile Unified Process (AUP) is the term for a simplified version of the Rational Unified Process that applies agile techniques to software development. Option B is correct.
Step-by-step explanation:
The term for a simplistic and understandable approach to developing business application software using agile techniques and concepts, which is a simplified version of the Rational Unified Process (RUP), is B) Agile Unified Process.
The Agile Unified Process (AUP) combines the simple and essential elements of the RUP with agile methodologies to provide a framework that helps streamline the software development process.
AUP incorporates RUP's disciplined approach to assigning tasks and responsibilities within a development organization, but it is less prescriptive and more adaptable to various types of projects than the traditional RUP.