Answer:
The correct answer is that scientists used radioactive dating to study the age of material from the moon and Earth.
A procedure of dating archaeological or geological samples by finding the comparative ratios of specific radioactive isotopes present in a sample is known as radiometric or radioactive dating. The scientists used radioactive dating to find the age of the Earth and the Moon. The surface of the moon is enveloped with loose rocky substances. The rocks obtained from the Moon have been found to be of 4.6 billion years old with the help of radiometric dating, which is approximately the same as that of Earth's age. The closeness of the calculated age of the Earth and the moon clarifies the notion that the whole solar system would have formed at a similar time.