As defined in the Agile Practice Guide and the Scrum Guide, scaling agile practices requires coordination between multiple teams working on the same product or program.

Why Choice D is correct: Scrum of Scrums (SoS) is a technique used when multiple teams (typically 3 to 9) need to coordinate their work.

Each team conducts its own Daily Standup to synchronize internal work.

A representative from each team (often the Scrum Master, but it can be any team member) then attends the Scrum of Scrums.

The focus of the SoS is on cross-team dependencies, integration issues, and blockers that affect more than one team. While a standard standup asks " What did I do? " , the SoS asks " What has my team done that might impact other teams? " and " What do we need from other teams? "

Analysis of other options:

A (SAFe®): While SAFe uses Scrum of Scrums as a component, SAFe is a massive, highly structured framework that includes many other elements like PI Planning and Release Train Engineers. The specific meeting described is the technique of SoS itself.

B (Disciplined Agile®): DA is a " toolkit " that helps teams choose their way of working (WoW). While it supports scaling, the specific meeting described is a standard Scrum pattern known as Scrum of Scrums.

C (LeSS): Large Scale Scrum (LeSS) is a specific framework for scaling. While it involves coordination, it emphasizes having a single Product Backlog and often uses " Overall Retrospectives " rather than the specific representative-based daily standup pattern described in the question.

Key Concept: The Scrum of Scrums is the most common and fundamental scaling technique. It ensures that even as a program grows, communication remains decentralized but coordinated, preventing the " silo effect " that can occur when four separate teams work on a single initiative.