Keri is simplifying 5·10−3.

Which could be the first step to use when simplifying the expression?
A) 5 · 10−3 = 5(10)^1/3
B) 5 · 10−3 = 1/50^3
C) 5 · 10−3 = 1/50^1/3
D) 5 · 10−3 = 5(1/103)