Fact 1: Agraduated cylinder is used to measure volume of a liquid.

Fact 2: Liquid volume is measured using a unit called a liter.

Given the two facts above, answer the question "What unit do graduated cylinders use?" with the following options: 
- engines
 - meters
 - power
 - liters
 - inches
 - two
 - cellulose
 - pounds


 

    liters     