A company requires a computing environment that supports increased scale and availability as well as secure communication. Which computing environment should the company use? Distributed Laptop Desktop Mainframe What is an advantage of a graphical user interface (GUI)? Less error-prone repetitive tasks Less idle CPU time during process execution Programmer-friendliness Visual representation of objects What is the relationship between process control blocks (PCBs), processes, and threads? Every thread has one or more PCBs, each of which manages one process. Every PCB manages one or more processes, each of which may have multiple threads. Every thread has one PCB, which may manage multiple processes. Every PCB manages one process, which in turn may have multiple threads