300 G of a Binary Salt Is Dissolved in Enough

30.0 g of a binary salt is dissolved in enough water to give a final volume of 800.0 ml. The freezing point of the water drops by 2.40°C. What is the molar mass of the binary salt?

A) 58.0 g·mol^-1
B) 74.5 g·mol^-1
C) 118 g·mol^-1
D) Not enough information given to answer the question
E) None of the above