Option C, Earth's temperature was too high for solid rocks to form.
Explanation:
During the Hadeon age ( some 4.6 billion years ago), the earth was at its initial stage of formation. By that time the temperature of earth was extremely high and extraterrestrial bombardments from other planets or celestial structures further raised the earth’s temperature. Due to such extremities and high temperature the rocks at the surface of earth could not solidify and hence no traces of rocks can be found from the Hadeon era.
