Let f: N->N be a step counting function. Then for some constant C, Time(f) is a proper subset of Time(_______)

Let f: N->N be a step counting function. Then for some constant C, Tim

1.	Let f: N->N be a step counting function. Then for some constant C, Time(f) is a proper subset of Time(_______)
A.	O(nf)
B.	O(n+f)
C.	O(n<sup>2</sup>f<sup>2</sup>)
D.	None of the mentioned
Answer» D. None of the mentioned