单选题

F(x)=1 (x<=1), F(n)=25*F(n/5)+n^2 ...

Question

F(x)=1 (x<=1), F(n)=25*F(n/5)+n^2 求F(n)的时间复杂度:

A. O(n*log(n))

B. O(log(n))

C. O(n)

D. O(n^2*log(n))