Describe, in detail, how to make 3.0 liters of a 3.5 molar hcl solution from an 18.5 molar hcl stock solution

C1V1=C2V2,
where C is concentration and V is volume,
 so let say C1=18.5M, V1=?,
C2=3.5M, V2=3.0L,
 now solve for V1, in this case V1=0.57L, so in order to make a 3.0L solution we will need to take 0.57L of stock HCl and add 2.43L of water. 

The correct answer is b) false

Just took the quiz on edgenuity and the correct answer is "c.  4.54 x  10–12  j"