Fact 1: Abalance is used for measuring mass of an object.

Fact 2: Unit for mass is the kilogram .

Given the two facts above, answer the question "Which measuring unit might be used when using a balance?" with the following options: 
- second
 - newton
 - heat
 - Heart rate
 - kilogram
 - liter
 - forces
 - steroids


 

     kilogram    