Explanation
According to the Build Incrementally with Fast, Integrated Learning Cycles article on the Scaled Agile Framework website, convergence of requirements with designs reduces the cone of uncertainty. The article states that "The cone of uncertainty describes the uncertainty and risk in estimates at different phases of development. The cone narrows as the project progresses, reflecting the fact that there is less uncertainty and risk as more is learned about the requirements and design of the system. The goal is to reduce the cone of uncertainty as quickly as possible by converging on the requirements and design through fast feedback and learning cycles." Therefore, the correct answer is A, convergence of requirements with designs. The other options are not accurate, as they are not the terms that describe reducing the cone of uncertainty. Convergence of alternatives with flexible specifications (B), convergence of architectures with design sets , and convergence of flexible specifications with design sets (D) are not concepts that are used in the Scaled Agile Framework.