Just need the correct answer no explanation

3. A race condition is when A. multiple processes are all trying to finish first. a process runs too slow. the correctness of the code depends upon the timing of the execution. D. a set of processes is waiting for an event that only another process in the set can cause. approach is 8. The msjor difficalty in designing a layered operating systetn A making sure each layer is easily converted to modules B. making sure that each layer hides certain data structures, hardware, and op- erstions. J debugging s particular layer D. sppeopriately delfining the various layers. 9. Whici is troe sbout processes and thread? Threads in a procem share the same stack B Threds in a proces sbare the same file descriptors C. Threads in a process share the snne register values D. Thresds in a process share the same progran program counter. 10. Most dften, spplication groa 11. For a single-processor system A processes spend loug tizues waiting to execute X B. there will never be more thas one rinning process C. input-output always causes CPU iowdown D, process scheduling is always optima 15. Long-term scheduling is performed typically on submitted jobs when processes must be moved from waiting to ready state C on processes in the ready queue D. All of the above are correct