Which of the following is true of Big Oh (O) notation.

A.

		If f(n) = 3n^3 (read as 3 times n cubed); Big Of of this function is O(n) for all n >= 2 B.
		If f(n) = 3n^2 (read as 3 times n squared); Big Of of this function is O(n^2 squared) for all n >= 3 C.
		If f(n) = 25n; Big Of of this function is O(n) for all n >= 0 D.
		If f(n) = 25n^2; //read as 25 times n squared Big Of of this function is O(n^2) (i.e., n squared) for all n >= 0