A Solution of 5 $\circ$ CWhat Is the Actual Van 'T Hoff Factor for This

A solution of 5.00 g of sodium chloride in 1.00 kg of water has a freezing point of -0.299 ^$\circ$ C.What is the actual van 't Hoff factor for this salt at this concentration compared to the ideal one of 2? [K_f(water) = 1.86 ^$\circ$ C/m]

A) 1.88
B) 1.98
C) 1.93
D) 1.83
E) 1.94