What is the order of the numbers from least to greatest? A = 1.5 x 10^3; B = 1.4 x 10^-1; C = 2 x 10^3; D = 1.4 x 10^-2 a: D < B < A < C* b: C < A < B < D c: D < A < C < B d: B < C < A < D