Why do scientists think that comets from the Kuiper belt may have contributed to Earth's early oceans? View Available Hint(s) O Icy comets now orbiting in the Kuiper belt could have collided with Earth during its formation. O Comets in the Kuiper belt produce meteorites that have landed on Earth O Comets vaporize into clouds when they enter the atmosphere, and the clouds produce precipitation. O Comets contain hydrogen, which is necessary for making a water molecule. O Comets in the Kuiper belt have a molecular signature similar to the water on Earth