Which of the following would constitute evidence that we are in the Anthropocene Era?
A. Clear-cut evidence of human impact in the rock strata that geologists use to define eras.
B. A company refusing to use GMO crops and instead planting acres and acres of non-GMO corn.
C. Creating a new building on the local bike trail that will showcase nature murals and examples of wildlife in the area.
D. The extinction of several species of insects in a forest that was cleared for industrial purposes.