It may be inferred from the passage that the larval environment which surrounds the vent crab Bythograea thermydron differs from its adult environment in that it

A．contains more thermal vents than the adult environment
B．receives more of its light from the sun than from hydrothermal vents
C．lacks the longer and dimmer wavelengths of light found in the adult environment
D．can be survived only by creatures equipped with image-forming optics
E．has a tendency to induce metamorphoses in the creatures that occupy it