The freezing point depression constant, Kfp, for water is 1.86 C/m. If 1.60 g of MgSO4 is dissolved in 18.0 g of H2O, what would be the solution's freezing temperature? The molar mass of MgSO4 is 120.37 g/mol.

a) -1.37 C

b) 2.75 C

c) 0.331 C

d) -0.331 C

e) -2.75 C