N-Step SCAN Differs from F-SCAN in That ________

Multiple Choice

N-Step SCAN differs from F-SCAN in that ________.

A) N-Step SCAN prevents indefinite postponement, but F-SCAN does not.
B) N-Step SCAN always provides higher throughput than F-SCAN, but results in a larger variance in response times.
C) N-Step SCAN selects requests it will service during the current sweep according to the number of requests; F-SCAN selects such requests according to time.
D) None of the above-N-Step SCAN and F-SCAN are identical.