Select all the correct statements about scheduling: select one or more:
(a) In Lottery scheduling, all processes have an equal chance to be scheduled
(b) In priority scheduling for interactive systems, low-priority processes may starve if priorities are not adjusted
(c) The SJF algorithm for batch systems selects processes so that the average turnaround time is minimal
(d) A process executing down(&semaphore) with semaphore = 1 will cause the scheduler to be invoked