Final answer:
The true statement is that value streams in DevOps emphasize collaboration and automation, aiming to improve the speed and quality of software delivery through streamlined processes.
Step-by-step explanation:
The correct statement about value streams that successfully use DevOps is C) Value streams in DevOps emphasize collaboration and automation. DevOps is an approach that aims to combine development (Dev) and operations (Ops) to improve the software development lifecycle. In a value stream that leverages DevOps effectively, there is a focus on streamlining processes to improve both the speed and quality of software delivery. This typically involves automation of manual processes, continuous integration and delivery, and fostering a culture of collaboration between the historically siloed development and operations teams.