To Prepare 100 ML of 0

To prepare 100 mL of 0.4 M HCl solution from a stock solution of 2 M HCl solution one needs to ________.

A) dilute 20 mL of 2 M HCl solution with 100 mL of HCl solution.
B) dilute 20 mL of 2 M HCl solution with enough water to make a total volume of 100 mL of solution.
C) use 500 mL of 2 M HCl solution and boil it down to a final volume of 100 mL of solution.
D) dilute 80 mL of 2 M HCl solution to a total volume of 100 mL of solution.