When 121 G of the Sugar Sucrose (A Nonelectrolyte) Is Dissolved

Multiple Choice

When 12.1 g of the sugar sucrose (a nonelectrolyte) is dissolved in exactly 800.0 g of water, the solution has a freezing point of -0.082 ^$\circ$ C. What is the molar mass of sucrose K_f of water is 1.86 ^$\circ$ C/m.

A) 426 g
B) 99.2 g
C) 178 g
D) 266 g
E) 343 g