Q4 Which of the task(s) below will be done by the device manager at the beginning of an I/O reques 1. finding at least a path to a device of the requested type II. Select appropriate path when there is many options. III. Determine when device is not busy. IV. Determine when the bus is not busy. Select one: O A Illand Ill only O B. I, II, III and IV OC II and IV only OD. None O E II, III and IV only What is referred to as instruction level parallelism is Select one: O A Systems that have instructions construct that can perform parallel processing, O B. Systems with library of functions which include parallel objects and methods. OC Systems that can perform on one or more streams or elements of data. O d. systems that can perform multiple instructions in parallel