Answer:
The answer is A. 0.001
Explanation:
1. Figure out what 10^3 is. It is 10 × 10 × 10, or just ten with three zeros. That's 1000.
2. Since it is 1/1000, it is the same thing as 1 ÷ 1000 which is 0.001. This is easy to figure out, since it is just 1 in the thousandths place or one with three zeros in front.