Which best explains how scientists confirmed that the moon formed around the same time as Earth?

Scientists determined the approximate age of fossils from the moon and Earth.
Scientists used radioactive dating to study the age of material from the moon and Earth.
Scientists explored the cycle of condensation and evaporation over time on the moon and Earth.
Scientists analyzed the content of gases that were part of the atmospheres on the moon and Earth.

Scientists used radioactive dating to study the age of material from the moon and Earth.