Gold numbers of protective colloids $$A, B, C$$ and $$D$$ are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is

A

$$D < A < C < B$$

B

$$C < B < D < A$$

C

$$A < C < B < D$$

D

$$B < D < A < C$$