depends on the plant, most likley C
One simple and easy way that scientists can accurately date fossils found is through the ground levels. When you take a big chunk out of the earth, you can see the changes in the texture in the "ground" Each "layer" represents a set of years. And as you get further and further into the ground, fossils become older and older.
Decreasing because when you travel west you will lose time. hopes this helped :)
When you are in danger in unknown territory, for example you’re flying a plane and you don’t know where you are doing and get lost. The flight controller may be able to find your location and save you.