Let f(x)=\sum_{k=2}^{10}(\lfloor k x\rfloor-k\lfloor x\rfloor), where \lfloor r\rfloor denotes the greatest integer less than or equal to r. How many distinct values does f(x) assume for x \geq 0 ?
Answer Choices
A. 32
B. 36
C. 45
D. 46
E. infinitely many