Which of the following solutes in aqueous solution would be expected to exhibit the largest freezing-point lowering (assuming ideal behavior)?
a. 0.1 m MgCl2
b. 0.2 m Acetic Acid (CH3CO2H)
c. 0.05 m Al2(SO4)3
d. 0.1 m NaCl
e. 0.25 m sucrose (C12H22O12)