What is a characteristic of multiprogramming?

Multiprogramming is a system where multiple programs are loaded into memory and executed concurrently, allowing for overlapping execution of tasks. This characteristic enhances resource utilization, as the CPU can switch between programs while one or more tasks are waiting for I/O operations to complete, effectively keeping the CPU busy instead of idling. By managing multiple programs in this fashion, multiprogramming improves the efficiency of the system and enables better responsiveness to user requests.

The other options do not accurately describe multiprogramming: sequential task execution implies one task runs completely before another starts, which contradicts the concept. Single-threaded processing suggests only one thread or process is active at a time, which also goes against the fundamentals of multiprogramming where multiple processes share CPU time. Task prioritization, while important in some contexts, is not a defining feature of multiprogramming itself; rather, it pertains to how tasks might be managed within a multiprogramming environment.