math
posted by Celest .
Which is the best way to find the weight of an elephant?
A) gallon
B) ounce
C) kilogram
D) liter
Is it B?

An elephant may weight 10,000 pounds.
A pound is 16 ounces.
16 * 10,000 = 160,000 ounces
Is there a better answer? 
a liter?

A liter and a gallon measure volume  like water or a soft drink.
http://en.wikipedia.org/wiki/Elephant
http://answers.reference.com/information/misc/what_weighs_a_kilogram 
My guess would be that its weight would be given in kg or in metric tons

The ounce is the only weight measurement here. Kilograms measure mass not weight. However if this is elementary science they may not know that and would use kilograms for weight.
weight = mass * local acceleration of gravity