Fact 1: Radioactive dating is used to determine the age of fossils.

Fact 2: Fossil Petrified wood is the state fossil.

Given the two facts above, answer the question "What can be determined with radioactive dating?" with the following options: 
- the age of algae
 - the age of flowers
 - the age of mammals
 - basic building blocks of life
 - dead organisms
 - movement of tectonic plates
 - the age of petrified wood
 - objects that have mass


 

       the age of petrified wood  