Which of the Following Do You Need to Know to Be

Multiple Choice

Which of the following do you need to know to be able to calculate the molarity of a salt solution?
I.the mass of salt added
II.the molar mass of the salt
III.the volume of water added
IV.the total volume of the solution

A) II and III only
B) I,II,and IV only
C) I,II,and III only
D) I and III only
E) You need all of the information.