A． it is improbable that enough volume of water from comets existed to fill the earth's oceans B． the water from the solar nebula contains less deuterium than sea water C． the water from the solar nebula existed close enough to the earth to participate in the accretion process D． without the water from the solar nebula more xenon would otherwise exist in seawater E． without the water from the solar nebula the earth's oceans would probably have formed at an earlier time
