Fact 1: Aruler is used for measuring the length of an object.

Fact 2: Meters are the standard to express measurement of length.

Given the two facts above, answer the question "What tool might measure something in meters?" with the following options: 
- A scale
 - microscope
 - bamboo
 - A protractor
 - feet
 - A ruler
 - biceps
 - A thermometer


 

      A ruler   