Answer:
Option C
Step-by-step explanation:
Option D's unit is not used in volume measurement. A "ton" is 2,000 lbs. Pounds are not used to measure volume.
Since we are looking at the volume of a "large tank", then a quart and a pint would be too small, and therefore, not the most appropriate units to measure the volume of the tank with.
A "kiloliter" is equivalent to 1,000 liters. Note that the prefix "Kilo-" means 1,000. A kiloliter would be appropriate for measuring the volume of a large object, in this case a oil tank. It is the most appropriate out of the options given.
Option C should be the correct answer.