Before the Industrial Revolution,scholars Believed That Earth Was Only 6,000

Before the industrial revolution,scholars believed that Earth was only 6,000 years old.What evidence first suggested that this belief might NOT be correct?

A) Scientists developed techniques to accurately determine the age of fossils.
B) Researchers saw bacteria undergoing natural selection at a rapid rate in the laboratory.
C) Geological studies showed that the slow action of rivers, glaciers, earthquakes, and volcanoes shapes Earth's surface over long periods of time.
D) Scholars observed that new species could evolve rapidly via artificial selection.