Solve If Needed, Round Money Amounts to Two Decimal Places

Multiple Choice

Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.
-The radiator in a certain make of car needs to contain 20 liters of 40% antifreeze. The radiator now contains 20 liters of 20% antifreeze. How many liters of this solution must be drained and replaced
With 100% antifreeze to get the desired strength?

A) 8 L
B) 10 L
C) 5.0 L
D) 6.7 L