正解:B
A sandbox is a virtual environment that isolates the engineer's research activities from the rest of the system.
This allows the engineer to test, experiment, and modify the system without affecting the real data, applications, or settings. A sandbox is the best environment for research purposes because it provides a safe and controlled way to explore new ideas, simulate scenarios, and troubleshoot problems. A sandbox can also be easily reset or deleted after the research is done.
References
What is a Sandbox Environment?
Chapter 4: Virtualization and Cloud Computing