A single thread of control allows the process to perform __________

A. Only one task at a time

B. Multiple tasks at a time
C. Only two tasks at a time
D. All of the mentioned

Explanation: A single thread of control allows the process to perform only one task at a time. In the case of multi-core, multiple threads can be run simultaneously and can perform multiple tasks at a time.

Occurrence: 0, System Administrator 2026