How Many Liters of Ethylene Glycol Antifreeze (C₂H₆O₂) Would You $\circ$

Multiple Choice

How many liters of ethylene glycol antifreeze (C₂H₆O₂) would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8 ^$\circ$ C (The density of ethylene glycol is 1.1 g/mL. For water, K_f = 1.86 ^$\circ$ C/m.)

A) 6.1 L
B) 7.1 L
C) 8.1 L
D) 9.1 L
E) None of the above