The Scrum Guide defines an Increment as "a concrete stepping stone toward the Product Goal" that
is usable and meets the Definition of "Done": "Each Increment is additive to all prior Increments and
thoroughly verified, ensuring that all Increments work together." Option E captures this—new,
usable features that build on previous work. Option A (test suite) is a tool, not an Increment. Option
B (UML diagrams) is documentation, not working software. Option C (task decomposition) is
planning, not a product. Option D (UI design) isn’t necessarily usable software. Thus, E best describes
an Increment.
Reference: Scrum Guide (2020), Section: "The Increment."
