Question

As the degree of multiprogramming is steadily increased beyond the point where the available physical frames can no longer satisfy each process's working set, what happens to CPU utilization according to the classic thrashing model?

A CPU utilization increases proportionally with the degree of multiprogramming
B CPU utilization remains constant regardless of the degree of multiprogramming
C CPU utilization initially rises, then drops sharply as thrashing sets in due to excessive paging activity
D CPU utilization drops to zero immediately the moment thrashing begins
E CPU utilization increases indefinitely since more processes generate more useful work
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