I need help please How do you prepare 250 ml 0.005 M CuCl2 solution from 0.1 M
CuCl2 stock solution?

a. By transferring 125 ml 0.1 M stock solution 500 ml
volumetric flask and making up the mark with water

b. By transferring 250 ml 0.1 M stock solution to 1000 ml
volumetric flask and making up the mark with water

C. By transferring 125 ml 0.1 M stock solution to 250 ml
volumetric flask and making up the mark with water

d. By mixing 125 ml 0.1 M stock solution with 125 ml water​