Given That the Value of K_f for Water Is 1 $\circ$

Multiple Choice

Given that the value of k_f for water is 1.86 ^$\circ$ C/m, what is the freezing point of an aqueous solution of NaCl prepared by mixing 427.0 g solute with 1.000 kg of water?

A) -4.36 ^$\circ$ C
B) -7.94 ^$\circ$ C
C) -13.6 ^$\circ$ C
D) -15.7 ^$\circ$ C
E) -18.3 ^$\circ$ C