For how many positive integers x is (x-2)(x-4)(x-6) \cdots(x-2016)(x-2018) \leq 0 ? (The product on the left side of the inequality consists of 1009 factors of the form x-2 k for integers k with 1 \leq k \leq 1009).
Answer Choices
A. 1009
B. 1010
C. 1514
D. 1515
E. 1513